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 },
- { "receive-pack", "receivepack", -1 },
+ { "upload-pack", "uploadpack", 1, 1 },
+ { "receive-pack", "receivepack", 0, -1 },
};
static struct string_list *get_parameters(void)
write_or_die(fd, buffer, n);
}
-static void http_status(unsigned code, const char *msg)
+static void http_status(struct strbuf *hdr, unsigned code, const char *msg)
{
- format_write(1, "Status: %u %s\r\n", code, msg);
+ strbuf_addf(hdr, "Status: %u %s\r\n", code, msg);
}
-static void hdr_str(const char *name, const char *value)
+static void hdr_str(struct strbuf *hdr, const char *name, const char *value)
{
- format_write(1, "%s: %s\r\n", name, value);
+ strbuf_addf(hdr, "%s: %s\r\n", name, value);
}
-static void hdr_int(const char *name, uintmax_t value)
+static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value)
{
- format_write(1, "%s: %" PRIuMAX "\r\n", name, value);
+ strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value);
}
-static void hdr_date(const char *name, unsigned long when)
+static void hdr_date(struct strbuf *hdr, const char *name, unsigned long when)
{
- const char *value = show_date(when, 0, DATE_RFC2822);
- hdr_str(name, value);
+ const char *value = show_date(when, 0, DATE_MODE(RFC2822));
+ hdr_str(hdr, name, value);
}
-static void hdr_nocache(void)
+static void hdr_nocache(struct strbuf *hdr)
{
- hdr_str("Expires", "Fri, 01 Jan 1980 00:00:00 GMT");
- hdr_str("Pragma", "no-cache");
- hdr_str("Cache-Control", "no-cache, max-age=0, must-revalidate");
+ 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(void)
+static void hdr_cache_forever(struct strbuf *hdr)
{
unsigned long now = time(NULL);
- hdr_date("Date", now);
- hdr_date("Expires", now + 31536000);
- hdr_str("Cache-Control", "public, max-age=31536000");
+ hdr_date(hdr, "Date", now);
+ hdr_date(hdr, "Expires", now + 31536000);
+ hdr_str(hdr, "Cache-Control", "public, max-age=31536000");
}
-static void end_headers(void)
+static void end_headers(struct strbuf *hdr)
{
- write_or_die(1, "\r\n", 2);
+ strbuf_add(hdr, "\r\n", 2);
+ write_or_die(1, hdr->buf, hdr->len);
+ strbuf_release(hdr);
}
-__attribute__((format (printf, 1, 2)))
-static NORETURN void not_found(const char *err, ...)
+__attribute__((format (printf, 2, 3)))
+static NORETURN void not_found(struct strbuf *hdr, const char *err, ...)
{
va_list params;
- http_status(404, "Not Found");
- hdr_nocache();
- end_headers();
+ http_status(hdr, 404, "Not Found");
+ hdr_nocache(hdr);
+ end_headers(hdr);
va_start(params, err);
if (err && *err)
exit(0);
}
-__attribute__((format (printf, 1, 2)))
-static NORETURN void forbidden(const char *err, ...)
+__attribute__((format (printf, 2, 3)))
+static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...)
{
va_list params;
- http_status(403, "Forbidden");
- hdr_nocache();
- end_headers();
+ http_status(hdr, 403, "Forbidden");
+ hdr_nocache(hdr);
+ end_headers(hdr);
va_start(params, err);
if (err && *err)
exit(0);
}
-static void select_getanyfile(void)
+static void select_getanyfile(struct strbuf *hdr)
{
if (!getanyfile)
- forbidden("Unsupported service: getanyfile");
+ forbidden(hdr, "Unsupported service: getanyfile");
}
-static void send_strbuf(const char *type, struct strbuf *buf)
+static void send_strbuf(struct strbuf *hdr,
+ const char *type, struct strbuf *buf)
{
- hdr_int(content_length, buf->len);
- hdr_str(content_type, type);
- end_headers();
+ 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(const char *the_type, const char *name)
+static void send_local_file(struct strbuf *hdr, const char *the_type,
+ const char *name)
{
- const char *p = git_path("%s", name);
+ char *p = git_pathdup("%s", name);
size_t buf_alloc = 8192;
char *buf = xmalloc(buf_alloc);
int fd;
fd = open(p, O_RDONLY);
if (fd < 0)
- not_found("Cannot open '%s': %s", p, strerror(errno));
+ not_found(hdr, "Cannot open '%s': %s", p, strerror(errno));
if (fstat(fd, &sb) < 0)
die_errno("Cannot stat '%s'", p);
- hdr_int(content_length, sb.st_size);
- hdr_str(content_type, the_type);
- hdr_date(last_modified, sb.st_mtime);
- end_headers();
+ 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);
}
close(fd);
free(buf);
+ free(p);
}
-static void get_text_file(char *name)
+static void get_text_file(struct strbuf *hdr, char *name)
{
- select_getanyfile();
- hdr_nocache();
- send_local_file("text/plain", name);
+ select_getanyfile(hdr);
+ hdr_nocache(hdr);
+ send_local_file(hdr, "text/plain", name);
}
-static void get_loose_object(char *name)
+static void get_loose_object(struct strbuf *hdr, char *name)
{
- select_getanyfile();
- hdr_cache_forever();
- send_local_file("application/x-git-loose-object", name);
+ select_getanyfile(hdr);
+ hdr_cache_forever(hdr);
+ send_local_file(hdr, "application/x-git-loose-object", name);
}
-static void get_pack_file(char *name)
+static void get_pack_file(struct strbuf *hdr, char *name)
{
- select_getanyfile();
- hdr_cache_forever();
- send_local_file("application/x-git-packed-objects", name);
+ select_getanyfile(hdr);
+ hdr_cache_forever(hdr);
+ send_local_file(hdr, "application/x-git-packed-objects", name);
}
-static void get_idx_file(char *name)
+static void get_idx_file(struct strbuf *hdr, char *name)
{
- select_getanyfile();
- hdr_cache_forever();
- send_local_file("application/x-git-packed-objects-toc", name);
+ select_getanyfile(hdr);
+ hdr_cache_forever(hdr);
+ send_local_file(hdr, "application/x-git-packed-objects-toc", name);
}
-static int http_config(const char *var, const char *value, void *cb)
+static void http_config(void)
{
- if (!strcmp(var, "http.getanyfile")) {
- getanyfile = git_config_bool(var, value);
- return 0;
- }
+ int i, value = 0;
+ struct strbuf var = STRBUF_INIT;
- if (starts_with(var, "http.")) {
- int i;
+ 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];
- if (!strcmp(var + 5, svc->config_name)) {
- svc->enabled = git_config_bool(var, value);
- return 0;
- }
- }
+ 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);
}
- /* we are not interested in parsing any other configuration here */
- return 0;
+ strbuf_release(&var);
}
-static struct rpc_service *select_service(const char *name)
+static struct rpc_service *select_service(struct strbuf *hdr, const char *name)
{
+ const char *svc_name;
struct rpc_service *svc = NULL;
int i;
- if (!starts_with(name, "git-"))
- forbidden("Unsupported service: '%s'", name);
+ 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, name + 4)) {
+ if (!strcmp(s->name, svc_name)) {
svc = s;
break;
}
}
if (!svc)
- forbidden("Unsupported service: '%s'", name);
+ 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("Service not enabled: '%s'", svc->name);
+ forbidden(hdr, "Service not enabled: '%s'", svc->name);
return svc;
}
-static void inflate_request(const char *prog_name, int out)
+/*
+ * 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(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 void inflate_request(const char *prog_name, int out, int buffer_input)
{
git_zstream stream;
+ unsigned char *full_request = NULL;
unsigned char in_buf[8192];
unsigned char out_buf[8192];
unsigned long cnt = 0;
git_inflate_init_gzip_only(&stream);
while (1) {
- ssize_t n = xread(0, in_buf, sizeof(in_buf));
+ ssize_t n;
+
+ if (buffer_input) {
+ if (full_request)
+ n = 0; /* nothing left to read */
+ else
+ n = read_request(0, &full_request);
+ stream.next_in = full_request;
+ } else {
+ n = xread(0, in_buf, sizeof(in_buf));
+ stream.next_in = in_buf;
+ }
+
if (n <= 0)
die("request ended in the middle of the gzip stream");
-
- stream.next_in = in_buf;
stream.avail_in = n;
while (0 < stream.avail_in) {
done:
git_inflate_end(&stream);
close(out);
+ free(full_request);
}
-static void run_service(const char **argv)
+static void copy_request(const char *prog_name, int out)
+{
+ unsigned char *buf;
+ ssize_t n = read_request(0, &buf);
+ if (n < 0)
+ die_errno("error reading request body");
+ if (write_in_full(out, buf, n) != n)
+ die("%s aborted reading request", prog_name);
+ close(out);
+ free(buf);
+}
+
+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");
- struct argv_array env = ARGV_ARRAY_INIT;
int gzipped_request = 0;
- struct child_process cld;
+ struct child_process cld = CHILD_PROCESS_INIT;
if (encoding && !strcmp(encoding, "gzip"))
gzipped_request = 1;
host = "(none)";
if (!getenv("GIT_COMMITTER_NAME"))
- argv_array_pushf(&env, "GIT_COMMITTER_NAME=%s", user);
+ argv_array_pushf(&cld.env_array, "GIT_COMMITTER_NAME=%s", user);
if (!getenv("GIT_COMMITTER_EMAIL"))
- argv_array_pushf(&env, "GIT_COMMITTER_EMAIL=%s@http.%s",
- user, host);
+ argv_array_pushf(&cld.env_array,
+ "GIT_COMMITTER_EMAIL=%s@http.%s", user, host);
- memset(&cld, 0, sizeof(cld));
cld.argv = argv;
- cld.env = env.argv;
- if (gzipped_request)
+ if (buffer_input || gzipped_request)
cld.in = -1;
cld.git_cmd = 1;
if (start_command(&cld))
close(1);
if (gzipped_request)
- inflate_request(argv[0], cld.in);
+ inflate_request(argv[0], cld.in, buffer_input);
+ else if (buffer_input)
+ copy_request(argv[0], cld.in);
else
close(0);
if (finish_command(&cld))
exit(1);
- argv_array_clear(&env);
}
-static int show_text_ref(const char *name, const unsigned char *sha1,
- int flag, void *cb_data)
+static int show_text_ref(const char *name, const struct object_id *oid,
+ int flag, void *cb_data)
{
const char *name_nons = strip_namespace(name);
struct strbuf *buf = cb_data;
- struct object *o = parse_object(sha1);
+ struct object *o = parse_object(oid->hash);
if (!o)
return 0;
- strbuf_addf(buf, "%s\t%s\n", sha1_to_hex(sha1), name_nons);
+ strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons);
if (o->type == OBJ_TAG) {
o = deref_tag(o, name, 0);
if (!o)
return 0;
- strbuf_addf(buf, "%s\t%s^{}\n", sha1_to_hex(o->sha1),
+ strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid),
name_nons);
}
return 0;
}
-static void get_info_refs(char *arg)
+static void get_info_refs(struct strbuf *hdr, char *arg)
{
const char *service_name = get_parameter("service");
struct strbuf buf = STRBUF_INIT;
- hdr_nocache();
+ hdr_nocache(hdr);
if (service_name) {
const char *argv[] = {NULL /* service name */,
"--stateless-rpc", "--advertise-refs",
".", NULL};
- struct rpc_service *svc = select_service(service_name);
+ struct rpc_service *svc = select_service(hdr, service_name);
strbuf_addf(&buf, "application/x-git-%s-advertisement",
svc->name);
- hdr_str(content_type, buf.buf);
- end_headers();
+ hdr_str(hdr, content_type, buf.buf);
+ end_headers(hdr);
- packet_write(1, "# service=git-%s\n", svc->name);
+ packet_write_fmt(1, "# service=git-%s\n", svc->name);
packet_flush(1);
argv[0] = svc->name;
- run_service(argv);
+ run_service(argv, 0);
} else {
- select_getanyfile();
+ select_getanyfile(hdr);
for_each_namespaced_ref(show_text_ref, &buf);
- send_strbuf("text/plain", &buf);
+ send_strbuf(hdr, "text/plain", &buf);
}
strbuf_release(&buf);
}
-static int show_head_ref(const char *refname, const unsigned char *sha1,
- int flag, void *cb_data)
+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) {
- unsigned char unused[20];
- const char *target = resolve_ref_unsafe(refname, unused, 1, NULL);
- const char *target_nons = strip_namespace(target);
+ struct object_id unused;
+ const char *target = resolve_ref_unsafe(refname,
+ RESOLVE_REF_READING,
+ unused.hash, NULL);
- strbuf_addf(buf, "ref: %s\n", target_nons);
+ if (target)
+ strbuf_addf(buf, "ref: %s\n", strip_namespace(target));
} else {
- strbuf_addf(buf, "%s\n", sha1_to_hex(sha1));
+ strbuf_addf(buf, "%s\n", oid_to_hex(oid));
}
return 0;
}
-static void get_head(char *arg)
+static void get_head(struct strbuf *hdr, char *arg)
{
struct strbuf buf = STRBUF_INIT;
- select_getanyfile();
+ select_getanyfile(hdr);
head_ref_namespaced(show_head_ref, &buf);
- send_strbuf("text/plain", &buf);
+ send_strbuf(hdr, "text/plain", &buf);
strbuf_release(&buf);
}
-static void get_info_packs(char *arg)
+static void get_info_packs(struct strbuf *hdr, char *arg)
{
size_t objdirlen = strlen(get_object_directory());
struct strbuf buf = STRBUF_INIT;
struct packed_git *p;
size_t cnt = 0;
- select_getanyfile();
+ select_getanyfile(hdr);
prepare_packed_git();
for (p = packed_git; p; p = p->next) {
if (p->pack_local)
}
strbuf_addch(&buf, '\n');
- hdr_nocache();
- send_strbuf("text/plain; charset=utf-8", &buf);
+ hdr_nocache(hdr);
+ send_strbuf(hdr, "text/plain; charset=utf-8", &buf);
strbuf_release(&buf);
}
-static void check_content_type(const char *accepted_type)
+static void check_content_type(struct strbuf *hdr, const char *accepted_type)
{
const char *actual_type = getenv("CONTENT_TYPE");
actual_type = "";
if (strcmp(actual_type, accepted_type)) {
- http_status(415, "Unsupported Media Type");
- hdr_nocache();
- end_headers();
+ 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",
}
}
-static void service_rpc(char *service_name)
+static void service_rpc(struct strbuf *hdr, char *service_name)
{
const char *argv[] = {NULL, "--stateless-rpc", ".", NULL};
- struct rpc_service *svc = select_service(service_name);
+ 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(buf.buf);
+ check_content_type(hdr, buf.buf);
- hdr_nocache();
+ hdr_nocache(hdr);
strbuf_reset(&buf);
strbuf_addf(&buf, "application/x-git-%s-result", svc->name);
- hdr_str(content_type, buf.buf);
+ hdr_str(hdr, content_type, buf.buf);
- end_headers();
+ end_headers(hdr);
argv[0] = svc->name;
- run_service(argv);
+ run_service(argv, svc->buffer_input);
strbuf_release(&buf);
}
+static int dead;
static NORETURN void die_webcgi(const char *err, va_list params)
{
- static int dead;
-
- if (!dead) {
- dead = 1;
- http_status(500, "Internal Server Error");
- hdr_nocache();
- end_headers();
+ if (dead <= 1) {
+ struct strbuf hdr = STRBUF_INIT;
vreportf("fatal: ", 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;
static struct service_cmd {
const char *method;
const char *pattern;
- void (*imp)(char *);
+ void (*imp)(struct strbuf *, char *);
} services[] = {
{"GET", "/HEAD$", get_head},
{"GET", "/info/refs$", get_info_refs},
{"POST", "/git-receive-pack$", service_rpc}
};
-int main(int argc, char **argv)
+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, const char **argv)
{
char *method = getenv("REQUEST_METHOD");
char *dir;
struct service_cmd *cmd = NULL;
char *cmd_arg = NULL;
int i;
+ struct strbuf hdr = STRBUF_INIT;
- git_setup_gettext();
-
- git_extract_argv0_path(argv[0]);
set_die_routine(die_webcgi);
+ set_die_is_recursing_routine(die_webcgi_recursing);
if (!method)
die("No REQUEST_METHOD from server");
if (!regexec(&re, dir, 1, out, 0)) {
size_t n;
- if (strcmp(method, c->method)) {
- const char *proto = getenv("SERVER_PROTOCOL");
- if (proto && !strcmp(proto, "HTTP/1.1")) {
- http_status(405, "Method Not Allowed");
- hdr_str("Allow", !strcmp(c->method, "GET") ?
- "GET, HEAD" : c->method);
- } else
- http_status(400, "Bad Request");
- hdr_nocache();
- end_headers();
- return 0;
- }
+ if (strcmp(method, c->method))
+ return bad_request(&hdr, c);
cmd = c;
n = out[0].rm_eo - out[0].rm_so;
}
if (!cmd)
- not_found("Request not supported: '%s'", dir);
+ not_found(&hdr, "Request not supported: '%s'", dir);
setup_path();
if (!enter_repo(dir, 0))
- not_found("Not a git repository: '%s'", dir);
+ not_found(&hdr, "Not a git repository: '%s'", dir);
if (!getenv("GIT_HTTP_EXPORT_ALL") &&
access("git-daemon-export-ok", F_OK) )
- not_found("Repository not exported: '%s'", dir);
+ not_found(&hdr, "Repository not exported: '%s'", dir);
+
+ http_config();
+ max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER",
+ max_request_buffer);
- git_config(http_config, NULL);
- cmd->imp(cmd_arg);
+ cmd->imp(&hdr, cmd_arg);
return 0;
}
projects / platform / upstream / git.git / blobdiff