mirror of
https://github.com/git/git.git
synced 2024-12-11 19:03:50 +08:00
bfbd0bb6ec
Signed-off-by: Peter Eriksen <s022018@student.dtu.dk> Signed-off-by: Junio C Hamano <junkio@cox.net>
1285 lines
31 KiB
C
1285 lines
31 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "pack.h"
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#include "fetch.h"
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#include "http.h"
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#ifndef NO_EXPAT
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#include <expat.h>
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/* Definitions for DAV requests */
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#define DAV_PROPFIND "PROPFIND"
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#define DAV_PROPFIND_RESP ".multistatus.response"
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#define DAV_PROPFIND_NAME ".multistatus.response.href"
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#define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
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#define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
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/* Definitions for processing XML DAV responses */
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#ifndef XML_STATUS_OK
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enum XML_Status {
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XML_STATUS_OK = 1,
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XML_STATUS_ERROR = 0
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};
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#define XML_STATUS_OK 1
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#define XML_STATUS_ERROR 0
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#endif
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/* Flags that control remote_ls processing */
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#define PROCESS_FILES (1u << 0)
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#define PROCESS_DIRS (1u << 1)
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#define RECURSIVE (1u << 2)
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/* Flags that remote_ls passes to callback functions */
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#define IS_DIR (1u << 0)
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#endif
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#define PREV_BUF_SIZE 4096
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#define RANGE_HEADER_SIZE 30
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static int got_alternates = -1;
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static int corrupt_object_found = 0;
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static struct curl_slist *no_pragma_header;
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struct alt_base
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{
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char *base;
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int path_len;
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int got_indices;
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struct packed_git *packs;
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struct alt_base *next;
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};
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static struct alt_base *alt = NULL;
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enum object_request_state {
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WAITING,
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ABORTED,
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ACTIVE,
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COMPLETE,
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};
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struct object_request
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{
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unsigned char sha1[20];
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struct alt_base *repo;
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char *url;
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char filename[PATH_MAX];
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char tmpfile[PATH_MAX];
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int local;
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enum object_request_state state;
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CURLcode curl_result;
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char errorstr[CURL_ERROR_SIZE];
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long http_code;
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unsigned char real_sha1[20];
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SHA_CTX c;
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z_stream stream;
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int zret;
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int rename;
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struct active_request_slot *slot;
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struct object_request *next;
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};
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struct alternates_request {
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char *base;
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char *url;
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struct buffer *buffer;
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struct active_request_slot *slot;
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int http_specific;
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};
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#ifndef NO_EXPAT
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struct xml_ctx
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{
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char *name;
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int len;
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char *cdata;
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void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
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void *userData;
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};
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struct remote_ls_ctx
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{
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struct alt_base *repo;
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char *path;
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void (*userFunc)(struct remote_ls_ctx *ls);
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void *userData;
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int flags;
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char *dentry_name;
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int dentry_flags;
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int rc;
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struct remote_ls_ctx *parent;
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};
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#endif
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static struct object_request *object_queue_head = NULL;
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static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
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void *data)
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{
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unsigned char expn[4096];
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size_t size = eltsize * nmemb;
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int posn = 0;
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struct object_request *obj_req = (struct object_request *)data;
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do {
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ssize_t retval = write(obj_req->local,
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ptr + posn, size - posn);
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if (retval < 0)
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return posn;
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posn += retval;
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} while (posn < size);
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obj_req->stream.avail_in = size;
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obj_req->stream.next_in = ptr;
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do {
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obj_req->stream.next_out = expn;
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obj_req->stream.avail_out = sizeof(expn);
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obj_req->zret = inflate(&obj_req->stream, Z_SYNC_FLUSH);
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SHA1_Update(&obj_req->c, expn,
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sizeof(expn) - obj_req->stream.avail_out);
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} while (obj_req->stream.avail_in && obj_req->zret == Z_OK);
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data_received++;
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return size;
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}
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static void fetch_alternates(char *base);
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static void process_object_response(void *callback_data);
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static void start_object_request(struct object_request *obj_req)
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{
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char *hex = sha1_to_hex(obj_req->sha1);
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char prevfile[PATH_MAX];
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char *url;
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char *posn;
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int prevlocal;
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unsigned char prev_buf[PREV_BUF_SIZE];
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ssize_t prev_read = 0;
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long prev_posn = 0;
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char range[RANGE_HEADER_SIZE];
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struct curl_slist *range_header = NULL;
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struct active_request_slot *slot;
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snprintf(prevfile, sizeof(prevfile), "%s.prev", obj_req->filename);
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unlink(prevfile);
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rename(obj_req->tmpfile, prevfile);
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unlink(obj_req->tmpfile);
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if (obj_req->local != -1)
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error("fd leakage in start: %d", obj_req->local);
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obj_req->local = open(obj_req->tmpfile,
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O_WRONLY | O_CREAT | O_EXCL, 0666);
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/* This could have failed due to the "lazy directory creation";
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* try to mkdir the last path component.
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*/
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if (obj_req->local < 0 && errno == ENOENT) {
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char *dir = strrchr(obj_req->tmpfile, '/');
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if (dir) {
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*dir = 0;
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mkdir(obj_req->tmpfile, 0777);
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*dir = '/';
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}
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obj_req->local = open(obj_req->tmpfile,
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O_WRONLY | O_CREAT | O_EXCL, 0666);
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}
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if (obj_req->local < 0) {
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obj_req->state = ABORTED;
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error("Couldn't create temporary file %s for %s: %s",
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obj_req->tmpfile, obj_req->filename, strerror(errno));
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return;
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}
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memset(&obj_req->stream, 0, sizeof(obj_req->stream));
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inflateInit(&obj_req->stream);
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SHA1_Init(&obj_req->c);
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url = xmalloc(strlen(obj_req->repo->base) + 50);
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obj_req->url = xmalloc(strlen(obj_req->repo->base) + 50);
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strcpy(url, obj_req->repo->base);
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posn = url + strlen(obj_req->repo->base);
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strcpy(posn, "objects/");
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posn += 8;
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memcpy(posn, hex, 2);
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posn += 2;
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*(posn++) = '/';
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strcpy(posn, hex + 2);
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strcpy(obj_req->url, url);
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/* If a previous temp file is present, process what was already
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fetched. */
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prevlocal = open(prevfile, O_RDONLY);
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if (prevlocal != -1) {
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do {
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prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
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if (prev_read>0) {
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if (fwrite_sha1_file(prev_buf,
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1,
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prev_read,
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obj_req) == prev_read) {
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prev_posn += prev_read;
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} else {
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prev_read = -1;
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}
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}
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} while (prev_read > 0);
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close(prevlocal);
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}
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unlink(prevfile);
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/* Reset inflate/SHA1 if there was an error reading the previous temp
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file; also rewind to the beginning of the local file. */
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if (prev_read == -1) {
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memset(&obj_req->stream, 0, sizeof(obj_req->stream));
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inflateInit(&obj_req->stream);
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SHA1_Init(&obj_req->c);
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if (prev_posn>0) {
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prev_posn = 0;
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lseek(obj_req->local, SEEK_SET, 0);
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ftruncate(obj_req->local, 0);
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}
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}
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slot = get_active_slot();
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slot->callback_func = process_object_response;
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slot->callback_data = obj_req;
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obj_req->slot = slot;
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curl_easy_setopt(slot->curl, CURLOPT_FILE, obj_req);
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curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
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curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, obj_req->errorstr);
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curl_easy_setopt(slot->curl, CURLOPT_URL, url);
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curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
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/* If we have successfully processed data from a previous fetch
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attempt, only fetch the data we don't already have. */
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if (prev_posn>0) {
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if (get_verbosely)
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fprintf(stderr,
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"Resuming fetch of object %s at byte %ld\n",
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hex, prev_posn);
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sprintf(range, "Range: bytes=%ld-", prev_posn);
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range_header = curl_slist_append(range_header, range);
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curl_easy_setopt(slot->curl,
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CURLOPT_HTTPHEADER, range_header);
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}
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/* Try to get the request started, abort the request on error */
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obj_req->state = ACTIVE;
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if (!start_active_slot(slot)) {
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obj_req->state = ABORTED;
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obj_req->slot = NULL;
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close(obj_req->local); obj_req->local = -1;
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free(obj_req->url);
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return;
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}
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}
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static void finish_object_request(struct object_request *obj_req)
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{
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struct stat st;
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fchmod(obj_req->local, 0444);
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close(obj_req->local); obj_req->local = -1;
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if (obj_req->http_code == 416) {
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fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
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} else if (obj_req->curl_result != CURLE_OK) {
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if (stat(obj_req->tmpfile, &st) == 0)
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if (st.st_size == 0)
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unlink(obj_req->tmpfile);
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return;
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}
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inflateEnd(&obj_req->stream);
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SHA1_Final(obj_req->real_sha1, &obj_req->c);
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if (obj_req->zret != Z_STREAM_END) {
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unlink(obj_req->tmpfile);
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return;
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}
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if (memcmp(obj_req->sha1, obj_req->real_sha1, 20)) {
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unlink(obj_req->tmpfile);
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return;
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}
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obj_req->rename =
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move_temp_to_file(obj_req->tmpfile, obj_req->filename);
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if (obj_req->rename == 0)
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pull_say("got %s\n", sha1_to_hex(obj_req->sha1));
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}
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static void process_object_response(void *callback_data)
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{
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struct object_request *obj_req =
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(struct object_request *)callback_data;
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obj_req->curl_result = obj_req->slot->curl_result;
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obj_req->http_code = obj_req->slot->http_code;
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obj_req->slot = NULL;
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obj_req->state = COMPLETE;
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/* Use alternates if necessary */
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if (obj_req->http_code == 404 ||
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obj_req->curl_result == CURLE_FILE_COULDNT_READ_FILE) {
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fetch_alternates(alt->base);
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if (obj_req->repo->next != NULL) {
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obj_req->repo =
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obj_req->repo->next;
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close(obj_req->local);
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obj_req->local = -1;
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start_object_request(obj_req);
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return;
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}
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}
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finish_object_request(obj_req);
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}
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static void release_object_request(struct object_request *obj_req)
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{
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struct object_request *entry = object_queue_head;
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if (obj_req->local != -1)
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error("fd leakage in release: %d", obj_req->local);
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if (obj_req == object_queue_head) {
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object_queue_head = obj_req->next;
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} else {
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while (entry->next != NULL && entry->next != obj_req)
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entry = entry->next;
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if (entry->next == obj_req)
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entry->next = entry->next->next;
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}
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free(obj_req->url);
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free(obj_req);
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}
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#ifdef USE_CURL_MULTI
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void fill_active_slots(void)
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{
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struct object_request *obj_req = object_queue_head;
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struct active_request_slot *slot = active_queue_head;
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int num_transfers;
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while (active_requests < max_requests && obj_req != NULL) {
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if (obj_req->state == WAITING) {
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if (has_sha1_file(obj_req->sha1))
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obj_req->state = COMPLETE;
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else
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start_object_request(obj_req);
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curl_multi_perform(curlm, &num_transfers);
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}
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obj_req = obj_req->next;
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}
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while (slot != NULL) {
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if (!slot->in_use && slot->curl != NULL) {
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curl_easy_cleanup(slot->curl);
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slot->curl = NULL;
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}
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slot = slot->next;
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}
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}
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#endif
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void prefetch(unsigned char *sha1)
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{
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struct object_request *newreq;
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struct object_request *tail;
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char *filename = sha1_file_name(sha1);
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newreq = xmalloc(sizeof(*newreq));
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memcpy(newreq->sha1, sha1, 20);
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newreq->repo = alt;
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newreq->url = NULL;
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newreq->local = -1;
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newreq->state = WAITING;
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snprintf(newreq->filename, sizeof(newreq->filename), "%s", filename);
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snprintf(newreq->tmpfile, sizeof(newreq->tmpfile),
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"%s.temp", filename);
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newreq->slot = NULL;
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newreq->next = NULL;
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if (object_queue_head == NULL) {
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object_queue_head = newreq;
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} else {
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tail = object_queue_head;
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while (tail->next != NULL) {
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tail = tail->next;
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}
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tail->next = newreq;
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}
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#ifdef USE_CURL_MULTI
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fill_active_slots();
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step_active_slots();
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#endif
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}
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static int fetch_index(struct alt_base *repo, unsigned char *sha1)
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{
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char *hex = sha1_to_hex(sha1);
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char *filename;
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char *url;
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char tmpfile[PATH_MAX];
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long prev_posn = 0;
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char range[RANGE_HEADER_SIZE];
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struct curl_slist *range_header = NULL;
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FILE *indexfile;
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struct active_request_slot *slot;
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struct slot_results results;
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if (has_pack_index(sha1))
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return 0;
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if (get_verbosely)
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fprintf(stderr, "Getting index for pack %s\n", hex);
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url = xmalloc(strlen(repo->base) + 64);
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sprintf(url, "%s/objects/pack/pack-%s.idx", repo->base, hex);
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filename = sha1_pack_index_name(sha1);
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snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
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indexfile = fopen(tmpfile, "a");
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if (!indexfile)
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return error("Unable to open local file %s for pack index",
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filename);
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slot = get_active_slot();
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slot->results = &results;
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curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
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curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
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curl_easy_setopt(slot->curl, CURLOPT_URL, url);
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curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
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slot->local = indexfile;
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/* If there is data present from a previous transfer attempt,
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resume where it left off */
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prev_posn = ftell(indexfile);
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if (prev_posn>0) {
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if (get_verbosely)
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fprintf(stderr,
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"Resuming fetch of index for pack %s at byte %ld\n",
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hex, prev_posn);
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sprintf(range, "Range: bytes=%ld-", prev_posn);
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range_header = curl_slist_append(range_header, range);
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curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
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}
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if (start_active_slot(slot)) {
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run_active_slot(slot);
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if (results.curl_result != CURLE_OK) {
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fclose(indexfile);
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return error("Unable to get pack index %s\n%s", url,
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curl_errorstr);
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}
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} else {
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fclose(indexfile);
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return error("Unable to start request");
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}
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fclose(indexfile);
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return move_temp_to_file(tmpfile, filename);
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}
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static int setup_index(struct alt_base *repo, unsigned char *sha1)
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{
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struct packed_git *new_pack;
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if (has_pack_file(sha1))
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return 0; // don't list this as something we can get
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if (fetch_index(repo, sha1))
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return -1;
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new_pack = parse_pack_index(sha1);
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new_pack->next = repo->packs;
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repo->packs = new_pack;
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return 0;
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}
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static void process_alternates_response(void *callback_data)
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{
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struct alternates_request *alt_req =
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(struct alternates_request *)callback_data;
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struct active_request_slot *slot = alt_req->slot;
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struct alt_base *tail = alt;
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char *base = alt_req->base;
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static const char null_byte = '\0';
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char *data;
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int i = 0;
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if (alt_req->http_specific) {
|
|
if (slot->curl_result != CURLE_OK ||
|
|
!alt_req->buffer->posn) {
|
|
|
|
/* Try reusing the slot to get non-http alternates */
|
|
alt_req->http_specific = 0;
|
|
sprintf(alt_req->url, "%s/objects/info/alternates",
|
|
base);
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL,
|
|
alt_req->url);
|
|
active_requests++;
|
|
slot->in_use = 1;
|
|
if (slot->finished != NULL)
|
|
(*slot->finished) = 0;
|
|
if (!start_active_slot(slot)) {
|
|
got_alternates = -1;
|
|
slot->in_use = 0;
|
|
if (slot->finished != NULL)
|
|
(*slot->finished) = 1;
|
|
}
|
|
return;
|
|
}
|
|
} else if (slot->curl_result != CURLE_OK) {
|
|
if (slot->http_code != 404 &&
|
|
slot->curl_result != CURLE_FILE_COULDNT_READ_FILE) {
|
|
got_alternates = -1;
|
|
return;
|
|
}
|
|
}
|
|
|
|
fwrite_buffer(&null_byte, 1, 1, alt_req->buffer);
|
|
alt_req->buffer->posn--;
|
|
data = alt_req->buffer->buffer;
|
|
|
|
while (i < alt_req->buffer->posn) {
|
|
int posn = i;
|
|
while (posn < alt_req->buffer->posn && data[posn] != '\n')
|
|
posn++;
|
|
if (data[posn] == '\n') {
|
|
int okay = 0;
|
|
int serverlen = 0;
|
|
struct alt_base *newalt;
|
|
char *target = NULL;
|
|
char *path;
|
|
if (data[i] == '/') {
|
|
serverlen = strchr(base + 8, '/') - base;
|
|
okay = 1;
|
|
} else if (!memcmp(data + i, "../", 3)) {
|
|
i += 3;
|
|
serverlen = strlen(base);
|
|
while (i + 2 < posn &&
|
|
!memcmp(data + i, "../", 3)) {
|
|
do {
|
|
serverlen--;
|
|
} while (serverlen &&
|
|
base[serverlen - 1] != '/');
|
|
i += 3;
|
|
}
|
|
// If the server got removed, give up.
|
|
okay = strchr(base, ':') - base + 3 <
|
|
serverlen;
|
|
} else if (alt_req->http_specific) {
|
|
char *colon = strchr(data + i, ':');
|
|
char *slash = strchr(data + i, '/');
|
|
if (colon && slash && colon < data + posn &&
|
|
slash < data + posn && colon < slash) {
|
|
okay = 1;
|
|
}
|
|
}
|
|
// skip 'objects' at end
|
|
if (okay) {
|
|
target = xmalloc(serverlen + posn - i - 6);
|
|
safe_strncpy(target, base, serverlen);
|
|
safe_strncpy(target + serverlen, data + i, posn - i - 6);
|
|
if (get_verbosely)
|
|
fprintf(stderr,
|
|
"Also look at %s\n", target);
|
|
newalt = xmalloc(sizeof(*newalt));
|
|
newalt->next = NULL;
|
|
newalt->base = target;
|
|
newalt->got_indices = 0;
|
|
newalt->packs = NULL;
|
|
path = strstr(target, "//");
|
|
if (path) {
|
|
path = strchr(path+2, '/');
|
|
if (path)
|
|
newalt->path_len = strlen(path);
|
|
}
|
|
|
|
while (tail->next != NULL)
|
|
tail = tail->next;
|
|
tail->next = newalt;
|
|
}
|
|
}
|
|
i = posn + 1;
|
|
}
|
|
|
|
got_alternates = 1;
|
|
}
|
|
|
|
static void fetch_alternates(char *base)
|
|
{
|
|
struct buffer buffer;
|
|
char *url;
|
|
char *data;
|
|
struct active_request_slot *slot;
|
|
struct alternates_request alt_req;
|
|
|
|
/* If another request has already started fetching alternates,
|
|
wait for them to arrive and return to processing this request's
|
|
curl message */
|
|
#ifdef USE_CURL_MULTI
|
|
while (got_alternates == 0) {
|
|
step_active_slots();
|
|
}
|
|
#endif
|
|
|
|
/* Nothing to do if they've already been fetched */
|
|
if (got_alternates == 1)
|
|
return;
|
|
|
|
/* Start the fetch */
|
|
got_alternates = 0;
|
|
|
|
data = xmalloc(4096);
|
|
buffer.size = 4096;
|
|
buffer.posn = 0;
|
|
buffer.buffer = data;
|
|
|
|
if (get_verbosely)
|
|
fprintf(stderr, "Getting alternates list for %s\n", base);
|
|
|
|
url = xmalloc(strlen(base) + 31);
|
|
sprintf(url, "%s/objects/info/http-alternates", base);
|
|
|
|
/* Use a callback to process the result, since another request
|
|
may fail and need to have alternates loaded before continuing */
|
|
slot = get_active_slot();
|
|
slot->callback_func = process_alternates_response;
|
|
slot->callback_data = &alt_req;
|
|
|
|
curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
|
|
|
|
alt_req.base = base;
|
|
alt_req.url = url;
|
|
alt_req.buffer = &buffer;
|
|
alt_req.http_specific = 1;
|
|
alt_req.slot = slot;
|
|
|
|
if (start_active_slot(slot))
|
|
run_active_slot(slot);
|
|
else
|
|
got_alternates = -1;
|
|
|
|
free(data);
|
|
free(url);
|
|
}
|
|
|
|
#ifndef NO_EXPAT
|
|
static void
|
|
xml_start_tag(void *userData, const char *name, const char **atts)
|
|
{
|
|
struct xml_ctx *ctx = (struct xml_ctx *)userData;
|
|
const char *c = strchr(name, ':');
|
|
int new_len;
|
|
|
|
if (c == NULL)
|
|
c = name;
|
|
else
|
|
c++;
|
|
|
|
new_len = strlen(ctx->name) + strlen(c) + 2;
|
|
|
|
if (new_len > ctx->len) {
|
|
ctx->name = xrealloc(ctx->name, new_len);
|
|
ctx->len = new_len;
|
|
}
|
|
strcat(ctx->name, ".");
|
|
strcat(ctx->name, c);
|
|
|
|
if (ctx->cdata) {
|
|
free(ctx->cdata);
|
|
ctx->cdata = NULL;
|
|
}
|
|
|
|
ctx->userFunc(ctx, 0);
|
|
}
|
|
|
|
static void
|
|
xml_end_tag(void *userData, const char *name)
|
|
{
|
|
struct xml_ctx *ctx = (struct xml_ctx *)userData;
|
|
const char *c = strchr(name, ':');
|
|
char *ep;
|
|
|
|
ctx->userFunc(ctx, 1);
|
|
|
|
if (c == NULL)
|
|
c = name;
|
|
else
|
|
c++;
|
|
|
|
ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
|
|
*ep = 0;
|
|
}
|
|
|
|
static void
|
|
xml_cdata(void *userData, const XML_Char *s, int len)
|
|
{
|
|
struct xml_ctx *ctx = (struct xml_ctx *)userData;
|
|
if (ctx->cdata)
|
|
free(ctx->cdata);
|
|
ctx->cdata = xmalloc(len + 1);
|
|
safe_strncpy(ctx->cdata, s, len + 1);
|
|
}
|
|
|
|
static int remote_ls(struct alt_base *repo, const char *path, int flags,
|
|
void (*userFunc)(struct remote_ls_ctx *ls),
|
|
void *userData);
|
|
|
|
static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
|
|
{
|
|
struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
|
|
|
|
if (tag_closed) {
|
|
if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
|
|
if (ls->dentry_flags & IS_DIR) {
|
|
if (ls->flags & PROCESS_DIRS) {
|
|
ls->userFunc(ls);
|
|
}
|
|
if (strcmp(ls->dentry_name, ls->path) &&
|
|
ls->flags & RECURSIVE) {
|
|
ls->rc = remote_ls(ls->repo,
|
|
ls->dentry_name,
|
|
ls->flags,
|
|
ls->userFunc,
|
|
ls->userData);
|
|
}
|
|
} else if (ls->flags & PROCESS_FILES) {
|
|
ls->userFunc(ls);
|
|
}
|
|
} else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
|
|
ls->dentry_name = xmalloc(strlen(ctx->cdata) -
|
|
ls->repo->path_len + 1);
|
|
strcpy(ls->dentry_name, ctx->cdata + ls->repo->path_len);
|
|
} else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
|
|
ls->dentry_flags |= IS_DIR;
|
|
}
|
|
} else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
|
|
if (ls->dentry_name) {
|
|
free(ls->dentry_name);
|
|
}
|
|
ls->dentry_name = NULL;
|
|
ls->dentry_flags = 0;
|
|
}
|
|
}
|
|
|
|
static int remote_ls(struct alt_base *repo, const char *path, int flags,
|
|
void (*userFunc)(struct remote_ls_ctx *ls),
|
|
void *userData)
|
|
{
|
|
char *url = xmalloc(strlen(repo->base) + strlen(path) + 1);
|
|
struct active_request_slot *slot;
|
|
struct slot_results results;
|
|
struct buffer in_buffer;
|
|
struct buffer out_buffer;
|
|
char *in_data;
|
|
char *out_data;
|
|
XML_Parser parser = XML_ParserCreate(NULL);
|
|
enum XML_Status result;
|
|
struct curl_slist *dav_headers = NULL;
|
|
struct xml_ctx ctx;
|
|
struct remote_ls_ctx ls;
|
|
|
|
ls.flags = flags;
|
|
ls.repo = repo;
|
|
ls.path = strdup(path);
|
|
ls.dentry_name = NULL;
|
|
ls.dentry_flags = 0;
|
|
ls.userData = userData;
|
|
ls.userFunc = userFunc;
|
|
ls.rc = 0;
|
|
|
|
sprintf(url, "%s%s", repo->base, path);
|
|
|
|
out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
|
|
out_data = xmalloc(out_buffer.size + 1);
|
|
snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
|
|
out_buffer.posn = 0;
|
|
out_buffer.buffer = out_data;
|
|
|
|
in_buffer.size = 4096;
|
|
in_data = xmalloc(in_buffer.size);
|
|
in_buffer.posn = 0;
|
|
in_buffer.buffer = in_data;
|
|
|
|
dav_headers = curl_slist_append(dav_headers, "Depth: 1");
|
|
dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
|
|
|
|
slot = get_active_slot();
|
|
slot->results = &results;
|
|
curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
|
|
curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
|
|
curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
|
|
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
|
|
|
|
if (start_active_slot(slot)) {
|
|
run_active_slot(slot);
|
|
if (results.curl_result == CURLE_OK) {
|
|
ctx.name = xcalloc(10, 1);
|
|
ctx.len = 0;
|
|
ctx.cdata = NULL;
|
|
ctx.userFunc = handle_remote_ls_ctx;
|
|
ctx.userData = &ls;
|
|
XML_SetUserData(parser, &ctx);
|
|
XML_SetElementHandler(parser, xml_start_tag,
|
|
xml_end_tag);
|
|
XML_SetCharacterDataHandler(parser, xml_cdata);
|
|
result = XML_Parse(parser, in_buffer.buffer,
|
|
in_buffer.posn, 1);
|
|
free(ctx.name);
|
|
|
|
if (result != XML_STATUS_OK) {
|
|
ls.rc = error("XML error: %s",
|
|
XML_ErrorString(
|
|
XML_GetErrorCode(parser)));
|
|
}
|
|
} else {
|
|
ls.rc = -1;
|
|
}
|
|
} else {
|
|
ls.rc = error("Unable to start PROPFIND request");
|
|
}
|
|
|
|
free(ls.path);
|
|
free(url);
|
|
free(out_data);
|
|
free(in_buffer.buffer);
|
|
curl_slist_free_all(dav_headers);
|
|
|
|
return ls.rc;
|
|
}
|
|
|
|
static void process_ls_pack(struct remote_ls_ctx *ls)
|
|
{
|
|
unsigned char sha1[20];
|
|
|
|
if (strlen(ls->dentry_name) == 63 &&
|
|
!strncmp(ls->dentry_name, "objects/pack/pack-", 18) &&
|
|
!strncmp(ls->dentry_name+58, ".pack", 5)) {
|
|
get_sha1_hex(ls->dentry_name + 18, sha1);
|
|
setup_index(ls->repo, sha1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static int fetch_indices(struct alt_base *repo)
|
|
{
|
|
unsigned char sha1[20];
|
|
char *url;
|
|
struct buffer buffer;
|
|
char *data;
|
|
int i = 0;
|
|
|
|
struct active_request_slot *slot;
|
|
struct slot_results results;
|
|
|
|
if (repo->got_indices)
|
|
return 0;
|
|
|
|
data = xmalloc(4096);
|
|
buffer.size = 4096;
|
|
buffer.posn = 0;
|
|
buffer.buffer = data;
|
|
|
|
if (get_verbosely)
|
|
fprintf(stderr, "Getting pack list for %s\n", repo->base);
|
|
|
|
#ifndef NO_EXPAT
|
|
if (remote_ls(repo, "objects/pack/", PROCESS_FILES,
|
|
process_ls_pack, NULL) == 0)
|
|
return 0;
|
|
#endif
|
|
|
|
url = xmalloc(strlen(repo->base) + 21);
|
|
sprintf(url, "%s/objects/info/packs", repo->base);
|
|
|
|
slot = get_active_slot();
|
|
slot->results = &results;
|
|
curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
|
|
if (start_active_slot(slot)) {
|
|
run_active_slot(slot);
|
|
if (results.curl_result != CURLE_OK) {
|
|
if (results.http_code == 404 ||
|
|
results.curl_result == CURLE_FILE_COULDNT_READ_FILE) {
|
|
repo->got_indices = 1;
|
|
free(buffer.buffer);
|
|
return 0;
|
|
} else {
|
|
repo->got_indices = 0;
|
|
free(buffer.buffer);
|
|
return error("%s", curl_errorstr);
|
|
}
|
|
}
|
|
} else {
|
|
repo->got_indices = 0;
|
|
free(buffer.buffer);
|
|
return error("Unable to start request");
|
|
}
|
|
|
|
data = buffer.buffer;
|
|
while (i < buffer.posn) {
|
|
switch (data[i]) {
|
|
case 'P':
|
|
i++;
|
|
if (i + 52 <= buffer.posn &&
|
|
!strncmp(data + i, " pack-", 6) &&
|
|
!strncmp(data + i + 46, ".pack\n", 6)) {
|
|
get_sha1_hex(data + i + 6, sha1);
|
|
setup_index(repo, sha1);
|
|
i += 51;
|
|
break;
|
|
}
|
|
default:
|
|
while (i < buffer.posn && data[i] != '\n')
|
|
i++;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
free(buffer.buffer);
|
|
repo->got_indices = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
|
|
{
|
|
char *url;
|
|
struct packed_git *target;
|
|
struct packed_git **lst;
|
|
FILE *packfile;
|
|
char *filename;
|
|
char tmpfile[PATH_MAX];
|
|
int ret;
|
|
long prev_posn = 0;
|
|
char range[RANGE_HEADER_SIZE];
|
|
struct curl_slist *range_header = NULL;
|
|
|
|
struct active_request_slot *slot;
|
|
struct slot_results results;
|
|
|
|
if (fetch_indices(repo))
|
|
return -1;
|
|
target = find_sha1_pack(sha1, repo->packs);
|
|
if (!target)
|
|
return -1;
|
|
|
|
if (get_verbosely) {
|
|
fprintf(stderr, "Getting pack %s\n",
|
|
sha1_to_hex(target->sha1));
|
|
fprintf(stderr, " which contains %s\n",
|
|
sha1_to_hex(sha1));
|
|
}
|
|
|
|
url = xmalloc(strlen(repo->base) + 65);
|
|
sprintf(url, "%s/objects/pack/pack-%s.pack",
|
|
repo->base, sha1_to_hex(target->sha1));
|
|
|
|
filename = sha1_pack_name(target->sha1);
|
|
snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
|
|
packfile = fopen(tmpfile, "a");
|
|
if (!packfile)
|
|
return error("Unable to open local file %s for pack",
|
|
filename);
|
|
|
|
slot = get_active_slot();
|
|
slot->results = &results;
|
|
curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
|
|
slot->local = packfile;
|
|
|
|
/* If there is data present from a previous transfer attempt,
|
|
resume where it left off */
|
|
prev_posn = ftell(packfile);
|
|
if (prev_posn>0) {
|
|
if (get_verbosely)
|
|
fprintf(stderr,
|
|
"Resuming fetch of pack %s at byte %ld\n",
|
|
sha1_to_hex(target->sha1), prev_posn);
|
|
sprintf(range, "Range: bytes=%ld-", prev_posn);
|
|
range_header = curl_slist_append(range_header, range);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
|
|
}
|
|
|
|
if (start_active_slot(slot)) {
|
|
run_active_slot(slot);
|
|
if (results.curl_result != CURLE_OK) {
|
|
fclose(packfile);
|
|
return error("Unable to get pack file %s\n%s", url,
|
|
curl_errorstr);
|
|
}
|
|
} else {
|
|
fclose(packfile);
|
|
return error("Unable to start request");
|
|
}
|
|
|
|
fclose(packfile);
|
|
|
|
ret = move_temp_to_file(tmpfile, filename);
|
|
if (ret)
|
|
return ret;
|
|
|
|
lst = &repo->packs;
|
|
while (*lst != target)
|
|
lst = &((*lst)->next);
|
|
*lst = (*lst)->next;
|
|
|
|
if (verify_pack(target, 0))
|
|
return -1;
|
|
install_packed_git(target);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void abort_object_request(struct object_request *obj_req)
|
|
{
|
|
if (obj_req->local >= 0) {
|
|
close(obj_req->local);
|
|
obj_req->local = -1;
|
|
}
|
|
unlink(obj_req->tmpfile);
|
|
if (obj_req->slot) {
|
|
release_active_slot(obj_req->slot);
|
|
obj_req->slot = NULL;
|
|
}
|
|
release_object_request(obj_req);
|
|
}
|
|
|
|
static int fetch_object(struct alt_base *repo, unsigned char *sha1)
|
|
{
|
|
char *hex = sha1_to_hex(sha1);
|
|
int ret = 0;
|
|
struct object_request *obj_req = object_queue_head;
|
|
|
|
while (obj_req != NULL && memcmp(obj_req->sha1, sha1, 20))
|
|
obj_req = obj_req->next;
|
|
if (obj_req == NULL)
|
|
return error("Couldn't find request for %s in the queue", hex);
|
|
|
|
if (has_sha1_file(obj_req->sha1)) {
|
|
abort_object_request(obj_req);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef USE_CURL_MULTI
|
|
while (obj_req->state == WAITING) {
|
|
step_active_slots();
|
|
}
|
|
#else
|
|
start_object_request(obj_req);
|
|
#endif
|
|
|
|
while (obj_req->state == ACTIVE) {
|
|
run_active_slot(obj_req->slot);
|
|
}
|
|
if (obj_req->local != -1) {
|
|
close(obj_req->local); obj_req->local = -1;
|
|
}
|
|
|
|
if (obj_req->state == ABORTED) {
|
|
ret = error("Request for %s aborted", hex);
|
|
} else if (obj_req->curl_result != CURLE_OK &&
|
|
obj_req->http_code != 416) {
|
|
if (obj_req->http_code == 404 ||
|
|
obj_req->curl_result == CURLE_FILE_COULDNT_READ_FILE)
|
|
ret = -1; /* Be silent, it is probably in a pack. */
|
|
else
|
|
ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
|
|
obj_req->errorstr, obj_req->curl_result,
|
|
obj_req->http_code, hex);
|
|
} else if (obj_req->zret != Z_STREAM_END) {
|
|
corrupt_object_found++;
|
|
ret = error("File %s (%s) corrupt", hex, obj_req->url);
|
|
} else if (memcmp(obj_req->sha1, obj_req->real_sha1, 20)) {
|
|
ret = error("File %s has bad hash", hex);
|
|
} else if (obj_req->rename < 0) {
|
|
ret = error("unable to write sha1 filename %s",
|
|
obj_req->filename);
|
|
}
|
|
|
|
release_object_request(obj_req);
|
|
return ret;
|
|
}
|
|
|
|
int fetch(unsigned char *sha1)
|
|
{
|
|
struct alt_base *altbase = alt;
|
|
|
|
if (!fetch_object(altbase, sha1))
|
|
return 0;
|
|
while (altbase) {
|
|
if (!fetch_pack(altbase, sha1))
|
|
return 0;
|
|
fetch_alternates(alt->base);
|
|
altbase = altbase->next;
|
|
}
|
|
return error("Unable to find %s under %s", sha1_to_hex(sha1),
|
|
alt->base);
|
|
}
|
|
|
|
static inline int needs_quote(int ch)
|
|
{
|
|
switch (ch) {
|
|
case '/': case '-': case '.':
|
|
case 'A'...'Z': case 'a'...'z': case '0'...'9':
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static inline int hex(int v)
|
|
{
|
|
if (v < 10) return '0' + v;
|
|
else return 'A' + v - 10;
|
|
}
|
|
|
|
static char *quote_ref_url(const char *base, const char *ref)
|
|
{
|
|
const char *cp;
|
|
char *dp, *qref;
|
|
int len, baselen, ch;
|
|
|
|
baselen = strlen(base);
|
|
len = baselen + 6; /* "refs/" + NUL */
|
|
for (cp = ref; (ch = *cp) != 0; cp++, len++)
|
|
if (needs_quote(ch))
|
|
len += 2; /* extra two hex plus replacement % */
|
|
qref = xmalloc(len);
|
|
memcpy(qref, base, baselen);
|
|
memcpy(qref + baselen, "refs/", 5);
|
|
for (cp = ref, dp = qref + baselen + 5; (ch = *cp) != 0; cp++) {
|
|
if (needs_quote(ch)) {
|
|
*dp++ = '%';
|
|
*dp++ = hex((ch >> 4) & 0xF);
|
|
*dp++ = hex(ch & 0xF);
|
|
}
|
|
else
|
|
*dp++ = ch;
|
|
}
|
|
*dp = 0;
|
|
|
|
return qref;
|
|
}
|
|
|
|
int fetch_ref(char *ref, unsigned char *sha1)
|
|
{
|
|
char *url;
|
|
char hex[42];
|
|
struct buffer buffer;
|
|
char *base = alt->base;
|
|
struct active_request_slot *slot;
|
|
struct slot_results results;
|
|
buffer.size = 41;
|
|
buffer.posn = 0;
|
|
buffer.buffer = hex;
|
|
hex[41] = '\0';
|
|
|
|
url = quote_ref_url(base, ref);
|
|
slot = get_active_slot();
|
|
slot->results = &results;
|
|
curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
|
|
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
|
|
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
|
|
if (start_active_slot(slot)) {
|
|
run_active_slot(slot);
|
|
if (results.curl_result != CURLE_OK)
|
|
return error("Couldn't get %s for %s\n%s",
|
|
url, ref, curl_errorstr);
|
|
} else {
|
|
return error("Unable to start request");
|
|
}
|
|
|
|
hex[40] = '\0';
|
|
get_sha1_hex(hex, sha1);
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char *commit_id;
|
|
char *url;
|
|
char *path;
|
|
int arg = 1;
|
|
int rc = 0;
|
|
|
|
setup_git_directory();
|
|
git_config(git_default_config);
|
|
|
|
while (arg < argc && argv[arg][0] == '-') {
|
|
if (argv[arg][1] == 't') {
|
|
get_tree = 1;
|
|
} else if (argv[arg][1] == 'c') {
|
|
get_history = 1;
|
|
} else if (argv[arg][1] == 'a') {
|
|
get_all = 1;
|
|
get_tree = 1;
|
|
get_history = 1;
|
|
} else if (argv[arg][1] == 'v') {
|
|
get_verbosely = 1;
|
|
} else if (argv[arg][1] == 'w') {
|
|
write_ref = argv[arg + 1];
|
|
arg++;
|
|
} else if (!strcmp(argv[arg], "--recover")) {
|
|
get_recover = 1;
|
|
}
|
|
arg++;
|
|
}
|
|
if (argc < arg + 2) {
|
|
usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
|
|
return 1;
|
|
}
|
|
commit_id = argv[arg];
|
|
url = argv[arg + 1];
|
|
write_ref_log_details = url;
|
|
|
|
http_init();
|
|
|
|
no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
|
|
|
|
alt = xmalloc(sizeof(*alt));
|
|
alt->base = url;
|
|
alt->got_indices = 0;
|
|
alt->packs = NULL;
|
|
alt->next = NULL;
|
|
path = strstr(url, "//");
|
|
if (path) {
|
|
path = strchr(path+2, '/');
|
|
if (path)
|
|
alt->path_len = strlen(path);
|
|
}
|
|
|
|
if (pull(commit_id))
|
|
rc = 1;
|
|
|
|
http_cleanup();
|
|
|
|
curl_slist_free_all(no_pragma_header);
|
|
|
|
if (corrupt_object_found) {
|
|
fprintf(stderr,
|
|
"Some loose object were found to be corrupt, but they might be just\n"
|
|
"a false '404 Not Found' error message sent with incorrect HTTP\n"
|
|
"status code. Suggest running git fsck-objects.\n");
|
|
}
|
|
return rc;
|
|
}
|