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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-09 13:34:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-09 13:34:27 +0000
commit4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f (patch)
tree47c1d492e9c956c1cd2b74dbd3b9d8b0db44dc4e /http-backend.c
parentInitial commit. (diff)
downloadgit-4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f.tar.xz
git-4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f.zip
Adding upstream version 1:2.43.0.upstream/1%2.43.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'http-backend.c')
-rw-r--r--http-backend.c809
1 files changed, 809 insertions, 0 deletions
diff --git a/http-backend.c b/http-backend.c
new file mode 100644
index 0000000..ff07b87
--- /dev/null
+++ b/http-backend.c
@@ -0,0 +1,809 @@
+#include "git-compat-util.h"
+#include "config.h"
+#include "environment.h"
+#include "git-zlib.h"
+#include "hex.h"
+#include "path.h"
+#include "repository.h"
+#include "refs.h"
+#include "pkt-line.h"
+#include "object.h"
+#include "tag.h"
+#include "exec-cmd.h"
+#include "run-command.h"
+#include "string-list.h"
+#include "url.h"
+#include "strvec.h"
+#include "packfile.h"
+#include "object-store-ll.h"
+#include "protocol.h"
+#include "date.h"
+#include "write-or-die.h"
+
+static const char content_type[] = "Content-Type";
+static const char content_length[] = "Content-Length";
+static const char last_modified[] = "Last-Modified";
+static int getanyfile = 1;
+static unsigned long max_request_buffer = 10 * 1024 * 1024;
+
+static struct string_list *query_params;
+
+struct rpc_service {
+ const char *name;
+ const char *config_name;
+ unsigned buffer_input : 1;
+ signed enabled : 2;
+};
+
+static struct rpc_service rpc_service[] = {
+ { "upload-pack", "uploadpack", 1, 1 },
+ { "receive-pack", "receivepack", 0, -1 },
+};
+
+static struct string_list *get_parameters(void)
+{
+ if (!query_params) {
+ const char *query = getenv("QUERY_STRING");
+
+ CALLOC_ARRAY(query_params, 1);
+ while (query && *query) {
+ char *name = url_decode_parameter_name(&query);
+ char *value = url_decode_parameter_value(&query);
+ struct string_list_item *i;
+
+ i = string_list_lookup(query_params, name);
+ if (!i)
+ i = string_list_insert(query_params, name);
+ else
+ free(i->util);
+ i->util = value;
+ }
+ }
+ return query_params;
+}
+
+static const char *get_parameter(const char *name)
+{
+ struct string_list_item *i;
+ i = string_list_lookup(get_parameters(), name);
+ return i ? i->util : NULL;
+}
+
+__attribute__((format (printf, 2, 3)))
+static void format_write(int fd, const char *fmt, ...)
+{
+ static char buffer[1024];
+
+ va_list args;
+ unsigned n;
+
+ va_start(args, fmt);
+ n = vsnprintf(buffer, sizeof(buffer), fmt, args);
+ va_end(args);
+ if (n >= sizeof(buffer))
+ die("protocol error: impossibly long line");
+
+ write_or_die(fd, buffer, n);
+}
+
+static void http_status(struct strbuf *hdr, unsigned code, const char *msg)
+{
+ strbuf_addf(hdr, "Status: %u %s\r\n", code, msg);
+}
+
+static void hdr_str(struct strbuf *hdr, const char *name, const char *value)
+{
+ strbuf_addf(hdr, "%s: %s\r\n", name, value);
+}
+
+static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value)
+{
+ strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value);
+}
+
+static void hdr_date(struct strbuf *hdr, const char *name, timestamp_t when)
+{
+ const char *value = show_date(when, 0, DATE_MODE(RFC2822));
+ hdr_str(hdr, name, value);
+}
+
+static void hdr_nocache(struct strbuf *hdr)
+{
+ hdr_str(hdr, "Expires", "Fri, 01 Jan 1980 00:00:00 GMT");
+ hdr_str(hdr, "Pragma", "no-cache");
+ hdr_str(hdr, "Cache-Control", "no-cache, max-age=0, must-revalidate");
+}
+
+static void hdr_cache_forever(struct strbuf *hdr)
+{
+ timestamp_t now = time(NULL);
+ hdr_date(hdr, "Date", now);
+ hdr_date(hdr, "Expires", now + 31536000);
+ hdr_str(hdr, "Cache-Control", "public, max-age=31536000");
+}
+
+static void end_headers(struct strbuf *hdr)
+{
+ strbuf_add(hdr, "\r\n", 2);
+ write_or_die(1, hdr->buf, hdr->len);
+ strbuf_release(hdr);
+}
+
+__attribute__((format (printf, 2, 3)))
+static NORETURN void not_found(struct strbuf *hdr, const char *err, ...)
+{
+ va_list params;
+
+ http_status(hdr, 404, "Not Found");
+ hdr_nocache(hdr);
+ end_headers(hdr);
+
+ va_start(params, err);
+ if (err && *err)
+ vfprintf(stderr, err, params);
+ va_end(params);
+ exit(0);
+}
+
+__attribute__((format (printf, 2, 3)))
+static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...)
+{
+ va_list params;
+
+ http_status(hdr, 403, "Forbidden");
+ hdr_nocache(hdr);
+ end_headers(hdr);
+
+ va_start(params, err);
+ if (err && *err)
+ vfprintf(stderr, err, params);
+ va_end(params);
+ exit(0);
+}
+
+static void select_getanyfile(struct strbuf *hdr)
+{
+ if (!getanyfile)
+ forbidden(hdr, "Unsupported service: getanyfile");
+}
+
+static void send_strbuf(struct strbuf *hdr,
+ const char *type, struct strbuf *buf)
+{
+ hdr_int(hdr, content_length, buf->len);
+ hdr_str(hdr, content_type, type);
+ end_headers(hdr);
+ write_or_die(1, buf->buf, buf->len);
+}
+
+static void send_local_file(struct strbuf *hdr, const char *the_type,
+ const char *name)
+{
+ char *p = git_pathdup("%s", name);
+ size_t buf_alloc = 8192;
+ char *buf = xmalloc(buf_alloc);
+ int fd;
+ struct stat sb;
+
+ fd = open(p, O_RDONLY);
+ if (fd < 0)
+ not_found(hdr, "Cannot open '%s': %s", p, strerror(errno));
+ if (fstat(fd, &sb) < 0)
+ die_errno("Cannot stat '%s'", p);
+
+ hdr_int(hdr, content_length, sb.st_size);
+ hdr_str(hdr, content_type, the_type);
+ hdr_date(hdr, last_modified, sb.st_mtime);
+ end_headers(hdr);
+
+ for (;;) {
+ ssize_t n = xread(fd, buf, buf_alloc);
+ if (n < 0)
+ die_errno("Cannot read '%s'", p);
+ if (!n)
+ break;
+ write_or_die(1, buf, n);
+ }
+ close(fd);
+ free(buf);
+ free(p);
+}
+
+static void get_text_file(struct strbuf *hdr, char *name)
+{
+ select_getanyfile(hdr);
+ hdr_nocache(hdr);
+ send_local_file(hdr, "text/plain", name);
+}
+
+static void get_loose_object(struct strbuf *hdr, char *name)
+{
+ select_getanyfile(hdr);
+ hdr_cache_forever(hdr);
+ send_local_file(hdr, "application/x-git-loose-object", name);
+}
+
+static void get_pack_file(struct strbuf *hdr, char *name)
+{
+ select_getanyfile(hdr);
+ hdr_cache_forever(hdr);
+ send_local_file(hdr, "application/x-git-packed-objects", name);
+}
+
+static void get_idx_file(struct strbuf *hdr, char *name)
+{
+ select_getanyfile(hdr);
+ hdr_cache_forever(hdr);
+ send_local_file(hdr, "application/x-git-packed-objects-toc", name);
+}
+
+static void http_config(void)
+{
+ int i, value = 0;
+ struct strbuf var = STRBUF_INIT;
+
+ git_config_get_bool("http.getanyfile", &getanyfile);
+ git_config_get_ulong("http.maxrequestbuffer", &max_request_buffer);
+
+ for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
+ struct rpc_service *svc = &rpc_service[i];
+ strbuf_addf(&var, "http.%s", svc->config_name);
+ if (!git_config_get_bool(var.buf, &value))
+ svc->enabled = value;
+ strbuf_reset(&var);
+ }
+
+ strbuf_release(&var);
+}
+
+static struct rpc_service *select_service(struct strbuf *hdr, const char *name)
+{
+ const char *svc_name;
+ struct rpc_service *svc = NULL;
+ int i;
+
+ if (!skip_prefix(name, "git-", &svc_name))
+ forbidden(hdr, "Unsupported service: '%s'", name);
+
+ for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
+ struct rpc_service *s = &rpc_service[i];
+ if (!strcmp(s->name, svc_name)) {
+ svc = s;
+ break;
+ }
+ }
+
+ if (!svc)
+ forbidden(hdr, "Unsupported service: '%s'", name);
+
+ if (svc->enabled < 0) {
+ const char *user = getenv("REMOTE_USER");
+ svc->enabled = (user && *user) ? 1 : 0;
+ }
+ if (!svc->enabled)
+ forbidden(hdr, "Service not enabled: '%s'", svc->name);
+ return svc;
+}
+
+static void write_to_child(int out, const unsigned char *buf, ssize_t len, const char *prog_name)
+{
+ if (write_in_full(out, buf, len) < 0)
+ die("unable to write to '%s'", prog_name);
+}
+
+/*
+ * This is basically strbuf_read(), except that if we
+ * hit max_request_buffer we die (we'd rather reject a
+ * maliciously large request than chew up infinite memory).
+ */
+static ssize_t read_request_eof(int fd, unsigned char **out)
+{
+ size_t len = 0, alloc = 8192;
+ unsigned char *buf = xmalloc(alloc);
+
+ if (max_request_buffer < alloc)
+ max_request_buffer = alloc;
+
+ while (1) {
+ ssize_t cnt;
+
+ cnt = read_in_full(fd, buf + len, alloc - len);
+ if (cnt < 0) {
+ free(buf);
+ return -1;
+ }
+
+ /* partial read from read_in_full means we hit EOF */
+ len += cnt;
+ if (len < alloc) {
+ *out = buf;
+ return len;
+ }
+
+ /* otherwise, grow and try again (if we can) */
+ if (alloc == max_request_buffer)
+ die("request was larger than our maximum size (%lu);"
+ " try setting GIT_HTTP_MAX_REQUEST_BUFFER",
+ max_request_buffer);
+
+ alloc = alloc_nr(alloc);
+ if (alloc > max_request_buffer)
+ alloc = max_request_buffer;
+ REALLOC_ARRAY(buf, alloc);
+ }
+}
+
+static ssize_t read_request_fixed_len(int fd, ssize_t req_len, unsigned char **out)
+{
+ unsigned char *buf = NULL;
+ ssize_t cnt = 0;
+
+ if (max_request_buffer < req_len) {
+ die("request was larger than our maximum size (%lu): "
+ "%" PRIuMAX "; try setting GIT_HTTP_MAX_REQUEST_BUFFER",
+ max_request_buffer, (uintmax_t)req_len);
+ }
+
+ buf = xmalloc(req_len);
+ cnt = read_in_full(fd, buf, req_len);
+ if (cnt < 0) {
+ free(buf);
+ return -1;
+ }
+ *out = buf;
+ return cnt;
+}
+
+static ssize_t get_content_length(void)
+{
+ ssize_t val = -1;
+ const char *str = getenv("CONTENT_LENGTH");
+
+ if (str && *str && !git_parse_ssize_t(str, &val))
+ die("failed to parse CONTENT_LENGTH: %s", str);
+ return val;
+}
+
+static ssize_t read_request(int fd, unsigned char **out, ssize_t req_len)
+{
+ if (req_len < 0)
+ return read_request_eof(fd, out);
+ else
+ return read_request_fixed_len(fd, req_len, out);
+}
+
+static void inflate_request(const char *prog_name, int out, int buffer_input, ssize_t req_len)
+{
+ git_zstream stream;
+ unsigned char *full_request = NULL;
+ unsigned char in_buf[8192];
+ unsigned char out_buf[8192];
+ unsigned long cnt = 0;
+ int req_len_defined = req_len >= 0;
+ size_t req_remaining_len = req_len;
+
+ memset(&stream, 0, sizeof(stream));
+ git_inflate_init_gzip_only(&stream);
+
+ while (1) {
+ ssize_t n;
+
+ if (buffer_input) {
+ if (full_request)
+ n = 0; /* nothing left to read */
+ else
+ n = read_request(0, &full_request, req_len);
+ stream.next_in = full_request;
+ } else {
+ ssize_t buffer_len;
+ if (req_len_defined && req_remaining_len <= sizeof(in_buf))
+ buffer_len = req_remaining_len;
+ else
+ buffer_len = sizeof(in_buf);
+ n = xread(0, in_buf, buffer_len);
+ stream.next_in = in_buf;
+ if (req_len_defined && n > 0)
+ req_remaining_len -= n;
+ }
+
+ if (n <= 0)
+ die("request ended in the middle of the gzip stream");
+ stream.avail_in = n;
+
+ while (0 < stream.avail_in) {
+ int ret;
+
+ stream.next_out = out_buf;
+ stream.avail_out = sizeof(out_buf);
+
+ ret = git_inflate(&stream, Z_NO_FLUSH);
+ if (ret != Z_OK && ret != Z_STREAM_END)
+ die("zlib error inflating request, result %d", ret);
+
+ n = stream.total_out - cnt;
+ write_to_child(out, out_buf, stream.total_out - cnt, prog_name);
+ cnt = stream.total_out;
+
+ if (ret == Z_STREAM_END)
+ goto done;
+ }
+ }
+
+done:
+ git_inflate_end(&stream);
+ close(out);
+ free(full_request);
+}
+
+static void copy_request(const char *prog_name, int out, ssize_t req_len)
+{
+ unsigned char *buf;
+ ssize_t n = read_request(0, &buf, req_len);
+ if (n < 0)
+ die_errno("error reading request body");
+ write_to_child(out, buf, n, prog_name);
+ close(out);
+ free(buf);
+}
+
+static void pipe_fixed_length(const char *prog_name, int out, size_t req_len)
+{
+ unsigned char buf[8192];
+ size_t remaining_len = req_len;
+
+ while (remaining_len > 0) {
+ size_t chunk_length = remaining_len > sizeof(buf) ? sizeof(buf) : remaining_len;
+ ssize_t n = xread(0, buf, chunk_length);
+ if (n < 0)
+ die_errno("Reading request failed");
+ write_to_child(out, buf, n, prog_name);
+ remaining_len -= n;
+ }
+
+ close(out);
+}
+
+static void run_service(const char **argv, int buffer_input)
+{
+ const char *encoding = getenv("HTTP_CONTENT_ENCODING");
+ const char *user = getenv("REMOTE_USER");
+ const char *host = getenv("REMOTE_ADDR");
+ int gzipped_request = 0;
+ struct child_process cld = CHILD_PROCESS_INIT;
+ ssize_t req_len = get_content_length();
+
+ if (encoding && (!strcmp(encoding, "gzip") || !strcmp(encoding, "x-gzip")))
+ gzipped_request = 1;
+
+ if (!user || !*user)
+ user = "anonymous";
+ if (!host || !*host)
+ host = "(none)";
+
+ if (!getenv("GIT_COMMITTER_NAME"))
+ strvec_pushf(&cld.env, "GIT_COMMITTER_NAME=%s", user);
+ if (!getenv("GIT_COMMITTER_EMAIL"))
+ strvec_pushf(&cld.env,
+ "GIT_COMMITTER_EMAIL=%s@http.%s", user, host);
+
+ strvec_pushv(&cld.args, argv);
+ if (buffer_input || gzipped_request || req_len >= 0)
+ cld.in = -1;
+ cld.git_cmd = 1;
+ cld.clean_on_exit = 1;
+ cld.wait_after_clean = 1;
+ if (start_command(&cld))
+ exit(1);
+
+ close(1);
+ if (gzipped_request)
+ inflate_request(argv[0], cld.in, buffer_input, req_len);
+ else if (buffer_input)
+ copy_request(argv[0], cld.in, req_len);
+ else if (req_len >= 0)
+ pipe_fixed_length(argv[0], cld.in, req_len);
+ else
+ close(0);
+
+ if (finish_command(&cld))
+ exit(1);
+}
+
+static int show_text_ref(const char *name, const struct object_id *oid,
+ int flag UNUSED, void *cb_data)
+{
+ const char *name_nons = strip_namespace(name);
+ struct strbuf *buf = cb_data;
+ struct object *o = parse_object(the_repository, oid);
+ if (!o)
+ return 0;
+
+ strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons);
+ if (o->type == OBJ_TAG) {
+ o = deref_tag(the_repository, o, name, 0);
+ if (!o)
+ return 0;
+ strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid),
+ name_nons);
+ }
+ return 0;
+}
+
+static void get_info_refs(struct strbuf *hdr, char *arg UNUSED)
+{
+ const char *service_name = get_parameter("service");
+ struct strbuf buf = STRBUF_INIT;
+
+ hdr_nocache(hdr);
+
+ if (service_name) {
+ const char *argv[] = {NULL /* service name */,
+ "--http-backend-info-refs",
+ ".", NULL};
+ struct rpc_service *svc = select_service(hdr, service_name);
+
+ strbuf_addf(&buf, "application/x-git-%s-advertisement",
+ svc->name);
+ hdr_str(hdr, content_type, buf.buf);
+ end_headers(hdr);
+
+
+ if (determine_protocol_version_server() != protocol_v2) {
+ packet_write_fmt(1, "# service=git-%s\n", svc->name);
+ packet_flush(1);
+ }
+
+ argv[0] = svc->name;
+ run_service(argv, 0);
+
+ } else {
+ select_getanyfile(hdr);
+ for_each_namespaced_ref(NULL, show_text_ref, &buf);
+ send_strbuf(hdr, "text/plain", &buf);
+ }
+ strbuf_release(&buf);
+}
+
+static int show_head_ref(const char *refname, const struct object_id *oid,
+ int flag, void *cb_data)
+{
+ struct strbuf *buf = cb_data;
+
+ if (flag & REF_ISSYMREF) {
+ const char *target = resolve_ref_unsafe(refname,
+ RESOLVE_REF_READING,
+ NULL, NULL);
+
+ if (target)
+ strbuf_addf(buf, "ref: %s\n", strip_namespace(target));
+ } else {
+ strbuf_addf(buf, "%s\n", oid_to_hex(oid));
+ }
+
+ return 0;
+}
+
+static void get_head(struct strbuf *hdr, char *arg UNUSED)
+{
+ struct strbuf buf = STRBUF_INIT;
+
+ select_getanyfile(hdr);
+ head_ref_namespaced(show_head_ref, &buf);
+ send_strbuf(hdr, "text/plain", &buf);
+ strbuf_release(&buf);
+}
+
+static void get_info_packs(struct strbuf *hdr, char *arg UNUSED)
+{
+ size_t objdirlen = strlen(get_object_directory());
+ struct strbuf buf = STRBUF_INIT;
+ struct packed_git *p;
+ size_t cnt = 0;
+
+ select_getanyfile(hdr);
+ for (p = get_all_packs(the_repository); p; p = p->next) {
+ if (p->pack_local)
+ cnt++;
+ }
+
+ strbuf_grow(&buf, cnt * 53 + 2);
+ for (p = get_all_packs(the_repository); p; p = p->next) {
+ if (p->pack_local)
+ strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6);
+ }
+ strbuf_addch(&buf, '\n');
+
+ hdr_nocache(hdr);
+ send_strbuf(hdr, "text/plain; charset=utf-8", &buf);
+ strbuf_release(&buf);
+}
+
+static void check_content_type(struct strbuf *hdr, const char *accepted_type)
+{
+ const char *actual_type = getenv("CONTENT_TYPE");
+
+ if (!actual_type)
+ actual_type = "";
+
+ if (strcmp(actual_type, accepted_type)) {
+ http_status(hdr, 415, "Unsupported Media Type");
+ hdr_nocache(hdr);
+ end_headers(hdr);
+ format_write(1,
+ "Expected POST with Content-Type '%s',"
+ " but received '%s' instead.\n",
+ accepted_type, actual_type);
+ exit(0);
+ }
+}
+
+static void service_rpc(struct strbuf *hdr, char *service_name)
+{
+ const char *argv[] = {NULL, "--stateless-rpc", ".", NULL};
+ struct rpc_service *svc = select_service(hdr, service_name);
+ struct strbuf buf = STRBUF_INIT;
+
+ strbuf_reset(&buf);
+ strbuf_addf(&buf, "application/x-git-%s-request", svc->name);
+ check_content_type(hdr, buf.buf);
+
+ hdr_nocache(hdr);
+
+ strbuf_reset(&buf);
+ strbuf_addf(&buf, "application/x-git-%s-result", svc->name);
+ hdr_str(hdr, content_type, buf.buf);
+
+ end_headers(hdr);
+
+ argv[0] = svc->name;
+ run_service(argv, svc->buffer_input);
+ strbuf_release(&buf);
+}
+
+static int dead;
+static NORETURN void die_webcgi(const char *err, va_list params)
+{
+ if (dead <= 1) {
+ struct strbuf hdr = STRBUF_INIT;
+ report_fn die_message_fn = get_die_message_routine();
+
+ die_message_fn(err, params);
+
+ http_status(&hdr, 500, "Internal Server Error");
+ hdr_nocache(&hdr);
+ end_headers(&hdr);
+ }
+ exit(0); /* we successfully reported a failure ;-) */
+}
+
+static int die_webcgi_recursing(void)
+{
+ return dead++ > 1;
+}
+
+static char* getdir(void)
+{
+ struct strbuf buf = STRBUF_INIT;
+ char *pathinfo = getenv("PATH_INFO");
+ char *root = getenv("GIT_PROJECT_ROOT");
+ char *path = getenv("PATH_TRANSLATED");
+
+ if (root && *root) {
+ if (!pathinfo || !*pathinfo)
+ die("GIT_PROJECT_ROOT is set but PATH_INFO is not");
+ if (daemon_avoid_alias(pathinfo))
+ die("'%s': aliased", pathinfo);
+ end_url_with_slash(&buf, root);
+ if (pathinfo[0] == '/')
+ pathinfo++;
+ strbuf_addstr(&buf, pathinfo);
+ return strbuf_detach(&buf, NULL);
+ } else if (path && *path) {
+ return xstrdup(path);
+ } else
+ die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server");
+ return NULL;
+}
+
+static struct service_cmd {
+ const char *method;
+ const char *pattern;
+ void (*imp)(struct strbuf *, char *);
+} services[] = {
+ {"GET", "/HEAD$", get_head},
+ {"GET", "/info/refs$", get_info_refs},
+ {"GET", "/objects/info/alternates$", get_text_file},
+ {"GET", "/objects/info/http-alternates$", get_text_file},
+ {"GET", "/objects/info/packs$", get_info_packs},
+ {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object},
+ {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{62}$", get_loose_object},
+ {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file},
+ {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.pack$", get_pack_file},
+ {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file},
+ {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.idx$", get_idx_file},
+
+ {"POST", "/git-upload-pack$", service_rpc},
+ {"POST", "/git-receive-pack$", service_rpc}
+};
+
+static int bad_request(struct strbuf *hdr, const struct service_cmd *c)
+{
+ const char *proto = getenv("SERVER_PROTOCOL");
+
+ if (proto && !strcmp(proto, "HTTP/1.1")) {
+ http_status(hdr, 405, "Method Not Allowed");
+ hdr_str(hdr, "Allow",
+ !strcmp(c->method, "GET") ? "GET, HEAD" : c->method);
+ } else
+ http_status(hdr, 400, "Bad Request");
+ hdr_nocache(hdr);
+ end_headers(hdr);
+ return 0;
+}
+
+int cmd_main(int argc UNUSED, const char **argv UNUSED)
+{
+ char *method = getenv("REQUEST_METHOD");
+ const char *proto_header;
+ char *dir;
+ struct service_cmd *cmd = NULL;
+ char *cmd_arg = NULL;
+ int i;
+ struct strbuf hdr = STRBUF_INIT;
+
+ set_die_routine(die_webcgi);
+ set_die_is_recursing_routine(die_webcgi_recursing);
+
+ if (!method)
+ die("No REQUEST_METHOD from server");
+ if (!strcmp(method, "HEAD"))
+ method = "GET";
+ dir = getdir();
+
+ for (i = 0; i < ARRAY_SIZE(services); i++) {
+ struct service_cmd *c = &services[i];
+ regex_t re;
+ regmatch_t out[1];
+ int ret;
+
+ if (regcomp(&re, c->pattern, REG_EXTENDED))
+ die("Bogus regex in service table: %s", c->pattern);
+ ret = regexec(&re, dir, 1, out, 0);
+ regfree(&re);
+
+ if (!ret) {
+ size_t n;
+
+ if (strcmp(method, c->method))
+ return bad_request(&hdr, c);
+
+ cmd = c;
+ n = out[0].rm_eo - out[0].rm_so;
+ cmd_arg = xmemdupz(dir + out[0].rm_so + 1, n - 1);
+ dir[out[0].rm_so] = 0;
+ break;
+ }
+ }
+
+ if (!cmd)
+ not_found(&hdr, "Request not supported: '%s'", dir);
+
+ setup_path();
+ if (!enter_repo(dir, 0))
+ not_found(&hdr, "Not a git repository: '%s'", dir);
+ if (!getenv("GIT_HTTP_EXPORT_ALL") &&
+ access("git-daemon-export-ok", F_OK) )
+ not_found(&hdr, "Repository not exported: '%s'", dir);
+ free(dir);
+
+ http_config();
+ max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER",
+ max_request_buffer);
+ proto_header = getenv("HTTP_GIT_PROTOCOL");
+ if (proto_header)
+ setenv(GIT_PROTOCOL_ENVIRONMENT, proto_header, 0);
+
+ cmd->imp(&hdr, cmd_arg);
+ free(cmd_arg);
+ return 0;
+}