| #include "cache.h" |
| #include "config.h" |
| #include "remote.h" |
| #include "connect.h" |
| #include "strbuf.h" |
| #include "walker.h" |
| #include "http.h" |
| #include "exec-cmd.h" |
| #include "run-command.h" |
| #include "pkt-line.h" |
| #include "string-list.h" |
| #include "sideband.h" |
| #include "argv-array.h" |
| #include "credential.h" |
| #include "sha1-array.h" |
| #include "send-pack.h" |
| #include "protocol.h" |
| #include "quote.h" |
| |
| static struct remote *remote; |
| /* always ends with a trailing slash */ |
| static struct strbuf url = STRBUF_INIT; |
| |
| struct options { |
| int verbosity; |
| unsigned long depth; |
| char *deepen_since; |
| struct string_list deepen_not; |
| struct string_list push_options; |
| char *filter; |
| unsigned progress : 1, |
| check_self_contained_and_connected : 1, |
| cloning : 1, |
| update_shallow : 1, |
| followtags : 1, |
| dry_run : 1, |
| thin : 1, |
| /* One of the SEND_PACK_PUSH_CERT_* constants. */ |
| push_cert : 2, |
| deepen_relative : 1, |
| from_promisor : 1, |
| no_dependents : 1; |
| }; |
| static struct options options; |
| static struct string_list cas_options = STRING_LIST_INIT_DUP; |
| |
| static int set_option(const char *name, const char *value) |
| { |
| if (!strcmp(name, "verbosity")) { |
| char *end; |
| int v = strtol(value, &end, 10); |
| if (value == end || *end) |
| return -1; |
| options.verbosity = v; |
| return 0; |
| } |
| else if (!strcmp(name, "progress")) { |
| if (!strcmp(value, "true")) |
| options.progress = 1; |
| else if (!strcmp(value, "false")) |
| options.progress = 0; |
| else |
| return -1; |
| return 0; |
| } |
| else if (!strcmp(name, "depth")) { |
| char *end; |
| unsigned long v = strtoul(value, &end, 10); |
| if (value == end || *end) |
| return -1; |
| options.depth = v; |
| return 0; |
| } |
| else if (!strcmp(name, "deepen-since")) { |
| options.deepen_since = xstrdup(value); |
| return 0; |
| } |
| else if (!strcmp(name, "deepen-not")) { |
| string_list_append(&options.deepen_not, value); |
| return 0; |
| } |
| else if (!strcmp(name, "deepen-relative")) { |
| if (!strcmp(value, "true")) |
| options.deepen_relative = 1; |
| else if (!strcmp(value, "false")) |
| options.deepen_relative = 0; |
| else |
| return -1; |
| return 0; |
| } |
| else if (!strcmp(name, "followtags")) { |
| if (!strcmp(value, "true")) |
| options.followtags = 1; |
| else if (!strcmp(value, "false")) |
| options.followtags = 0; |
| else |
| return -1; |
| return 0; |
| } |
| else if (!strcmp(name, "dry-run")) { |
| if (!strcmp(value, "true")) |
| options.dry_run = 1; |
| else if (!strcmp(value, "false")) |
| options.dry_run = 0; |
| else |
| return -1; |
| return 0; |
| } |
| else if (!strcmp(name, "check-connectivity")) { |
| if (!strcmp(value, "true")) |
| options.check_self_contained_and_connected = 1; |
| else if (!strcmp(value, "false")) |
| options.check_self_contained_and_connected = 0; |
| else |
| return -1; |
| return 0; |
| } |
| else if (!strcmp(name, "cas")) { |
| struct strbuf val = STRBUF_INIT; |
| strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value); |
| string_list_append(&cas_options, val.buf); |
| strbuf_release(&val); |
| return 0; |
| } else if (!strcmp(name, "cloning")) { |
| if (!strcmp(value, "true")) |
| options.cloning = 1; |
| else if (!strcmp(value, "false")) |
| options.cloning = 0; |
| else |
| return -1; |
| return 0; |
| } else if (!strcmp(name, "update-shallow")) { |
| if (!strcmp(value, "true")) |
| options.update_shallow = 1; |
| else if (!strcmp(value, "false")) |
| options.update_shallow = 0; |
| else |
| return -1; |
| return 0; |
| } else if (!strcmp(name, "pushcert")) { |
| if (!strcmp(value, "true")) |
| options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS; |
| else if (!strcmp(value, "false")) |
| options.push_cert = SEND_PACK_PUSH_CERT_NEVER; |
| else if (!strcmp(value, "if-asked")) |
| options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED; |
| else |
| return -1; |
| return 0; |
| } else if (!strcmp(name, "push-option")) { |
| if (*value != '"') |
| string_list_append(&options.push_options, value); |
| else { |
| struct strbuf unquoted = STRBUF_INIT; |
| if (unquote_c_style(&unquoted, value, NULL) < 0) |
| die("invalid quoting in push-option value"); |
| string_list_append_nodup(&options.push_options, |
| strbuf_detach(&unquoted, NULL)); |
| } |
| return 0; |
| |
| #if LIBCURL_VERSION_NUM >= 0x070a08 |
| } else if (!strcmp(name, "family")) { |
| if (!strcmp(value, "ipv4")) |
| git_curl_ipresolve = CURL_IPRESOLVE_V4; |
| else if (!strcmp(value, "ipv6")) |
| git_curl_ipresolve = CURL_IPRESOLVE_V6; |
| else if (!strcmp(value, "all")) |
| git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER; |
| else |
| return -1; |
| return 0; |
| #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */ |
| } else if (!strcmp(name, "from-promisor")) { |
| options.from_promisor = 1; |
| return 0; |
| } else if (!strcmp(name, "no-dependents")) { |
| options.no_dependents = 1; |
| return 0; |
| } else if (!strcmp(name, "filter")) { |
| options.filter = xstrdup(value); |
| return 0; |
| } else { |
| return 1 /* unsupported */; |
| } |
| } |
| |
| struct discovery { |
| char *service; |
| char *buf_alloc; |
| char *buf; |
| size_t len; |
| struct ref *refs; |
| struct oid_array shallow; |
| enum protocol_version version; |
| unsigned proto_git : 1; |
| }; |
| static struct discovery *last_discovery; |
| |
| static struct ref *parse_git_refs(struct discovery *heads, int for_push) |
| { |
| struct ref *list = NULL; |
| struct packet_reader reader; |
| |
| packet_reader_init(&reader, -1, heads->buf, heads->len, |
| PACKET_READ_CHOMP_NEWLINE | |
| PACKET_READ_GENTLE_ON_EOF | |
| PACKET_READ_DIE_ON_ERR_PACKET); |
| |
| heads->version = discover_version(&reader); |
| switch (heads->version) { |
| case protocol_v2: |
| /* |
| * Do nothing. This isn't a list of refs but rather a |
| * capability advertisement. Client would have run |
| * 'stateless-connect' so we'll dump this capability listing |
| * and let them request the refs themselves. |
| */ |
| break; |
| case protocol_v1: |
| case protocol_v0: |
| get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0, |
| NULL, &heads->shallow); |
| break; |
| case protocol_unknown_version: |
| BUG("unknown protocol version"); |
| } |
| |
| return list; |
| } |
| |
| static struct ref *parse_info_refs(struct discovery *heads) |
| { |
| char *data, *start, *mid; |
| char *ref_name; |
| int i = 0; |
| |
| struct ref *refs = NULL; |
| struct ref *ref = NULL; |
| struct ref *last_ref = NULL; |
| |
| data = heads->buf; |
| start = NULL; |
| mid = data; |
| while (i < heads->len) { |
| if (!start) { |
| start = &data[i]; |
| } |
| if (data[i] == '\t') |
| mid = &data[i]; |
| if (data[i] == '\n') { |
| if (mid - start != 40) |
| die("%sinfo/refs not valid: is this a git repository?", |
| url.buf); |
| data[i] = 0; |
| ref_name = mid + 1; |
| ref = alloc_ref(ref_name); |
| get_oid_hex(start, &ref->old_oid); |
| if (!refs) |
| refs = ref; |
| if (last_ref) |
| last_ref->next = ref; |
| last_ref = ref; |
| start = NULL; |
| } |
| i++; |
| } |
| |
| ref = alloc_ref("HEAD"); |
| if (!http_fetch_ref(url.buf, ref) && |
| !resolve_remote_symref(ref, refs)) { |
| ref->next = refs; |
| refs = ref; |
| } else { |
| free(ref); |
| } |
| |
| return refs; |
| } |
| |
| static void free_discovery(struct discovery *d) |
| { |
| if (d) { |
| if (d == last_discovery) |
| last_discovery = NULL; |
| free(d->shallow.oid); |
| free(d->buf_alloc); |
| free_refs(d->refs); |
| free(d->service); |
| free(d); |
| } |
| } |
| |
| static int show_http_message(struct strbuf *type, struct strbuf *charset, |
| struct strbuf *msg) |
| { |
| const char *p, *eol; |
| |
| /* |
| * We only show text/plain parts, as other types are likely |
| * to be ugly to look at on the user's terminal. |
| */ |
| if (strcmp(type->buf, "text/plain")) |
| return -1; |
| if (charset->len) |
| strbuf_reencode(msg, charset->buf, get_log_output_encoding()); |
| |
| strbuf_trim(msg); |
| if (!msg->len) |
| return -1; |
| |
| p = msg->buf; |
| do { |
| eol = strchrnul(p, '\n'); |
| fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p); |
| p = eol + 1; |
| } while(*eol); |
| return 0; |
| } |
| |
| static int get_protocol_http_header(enum protocol_version version, |
| struct strbuf *header) |
| { |
| if (version > 0) { |
| strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d", |
| version); |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void check_smart_http(struct discovery *d, const char *service, |
| struct strbuf *type) |
| { |
| const char *p; |
| struct packet_reader reader; |
| |
| /* |
| * If we don't see x-$service-advertisement, then it's not smart-http. |
| * But once we do, we commit to it and assume any other protocol |
| * violations are hard errors. |
| */ |
| if (!skip_prefix(type->buf, "application/x-", &p) || |
| !skip_prefix(p, service, &p) || |
| strcmp(p, "-advertisement")) |
| return; |
| |
| packet_reader_init(&reader, -1, d->buf, d->len, |
| PACKET_READ_CHOMP_NEWLINE | |
| PACKET_READ_DIE_ON_ERR_PACKET); |
| if (packet_reader_read(&reader) != PACKET_READ_NORMAL) |
| die("invalid server response; expected service, got flush packet"); |
| |
| if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) { |
| /* |
| * The header can include additional metadata lines, up |
| * until a packet flush marker. Ignore these now, but |
| * in the future we might start to scan them. |
| */ |
| for (;;) { |
| packet_reader_read(&reader); |
| if (reader.pktlen <= 0) { |
| break; |
| } |
| } |
| |
| /* |
| * v0 smart http; callers expect us to soak up the |
| * service and header packets |
| */ |
| d->buf = reader.src_buffer; |
| d->len = reader.src_len; |
| d->proto_git = 1; |
| |
| } else if (!strcmp(reader.line, "version 2")) { |
| /* |
| * v2 smart http; do not consume version packet, which will |
| * be handled elsewhere. |
| */ |
| d->proto_git = 1; |
| |
| } else { |
| die("invalid server response; got '%s'", reader.line); |
| } |
| } |
| |
| static struct discovery *discover_refs(const char *service, int for_push) |
| { |
| struct strbuf type = STRBUF_INIT; |
| struct strbuf charset = STRBUF_INIT; |
| struct strbuf buffer = STRBUF_INIT; |
| struct strbuf refs_url = STRBUF_INIT; |
| struct strbuf effective_url = STRBUF_INIT; |
| struct strbuf protocol_header = STRBUF_INIT; |
| struct string_list extra_headers = STRING_LIST_INIT_DUP; |
| struct discovery *last = last_discovery; |
| int http_ret, maybe_smart = 0; |
| struct http_get_options http_options; |
| enum protocol_version version = get_protocol_version_config(); |
| |
| if (last && !strcmp(service, last->service)) |
| return last; |
| free_discovery(last); |
| |
| strbuf_addf(&refs_url, "%sinfo/refs", url.buf); |
| if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) && |
| git_env_bool("GIT_SMART_HTTP", 1)) { |
| maybe_smart = 1; |
| if (!strchr(url.buf, '?')) |
| strbuf_addch(&refs_url, '?'); |
| else |
| strbuf_addch(&refs_url, '&'); |
| strbuf_addf(&refs_url, "service=%s", service); |
| } |
| |
| /* |
| * NEEDSWORK: If we are trying to use protocol v2 and we are planning |
| * to perform a push, then fallback to v0 since the client doesn't know |
| * how to push yet using v2. |
| */ |
| if (version == protocol_v2 && !strcmp("git-receive-pack", service)) |
| version = protocol_v0; |
| |
| /* Add the extra Git-Protocol header */ |
| if (get_protocol_http_header(version, &protocol_header)) |
| string_list_append(&extra_headers, protocol_header.buf); |
| |
| memset(&http_options, 0, sizeof(http_options)); |
| http_options.content_type = &type; |
| http_options.charset = &charset; |
| http_options.effective_url = &effective_url; |
| http_options.base_url = &url; |
| http_options.extra_headers = &extra_headers; |
| http_options.initial_request = 1; |
| http_options.no_cache = 1; |
| |
| http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options); |
| switch (http_ret) { |
| case HTTP_OK: |
| break; |
| case HTTP_MISSING_TARGET: |
| show_http_message(&type, &charset, &buffer); |
| die("repository '%s' not found", url.buf); |
| case HTTP_NOAUTH: |
| show_http_message(&type, &charset, &buffer); |
| die("Authentication failed for '%s'", url.buf); |
| default: |
| show_http_message(&type, &charset, &buffer); |
| die("unable to access '%s': %s", url.buf, curl_errorstr); |
| } |
| |
| if (options.verbosity && !starts_with(refs_url.buf, url.buf)) |
| warning(_("redirecting to %s"), url.buf); |
| |
| last= xcalloc(1, sizeof(*last_discovery)); |
| last->service = xstrdup(service); |
| last->buf_alloc = strbuf_detach(&buffer, &last->len); |
| last->buf = last->buf_alloc; |
| |
| if (maybe_smart) |
| check_smart_http(last, service, &type); |
| |
| if (last->proto_git) |
| last->refs = parse_git_refs(last, for_push); |
| else |
| last->refs = parse_info_refs(last); |
| |
| strbuf_release(&refs_url); |
| strbuf_release(&type); |
| strbuf_release(&charset); |
| strbuf_release(&effective_url); |
| strbuf_release(&buffer); |
| strbuf_release(&protocol_header); |
| string_list_clear(&extra_headers, 0); |
| last_discovery = last; |
| return last; |
| } |
| |
| static struct ref *get_refs(int for_push) |
| { |
| struct discovery *heads; |
| |
| if (for_push) |
| heads = discover_refs("git-receive-pack", for_push); |
| else |
| heads = discover_refs("git-upload-pack", for_push); |
| |
| return heads->refs; |
| } |
| |
| static void output_refs(struct ref *refs) |
| { |
| struct ref *posn; |
| for (posn = refs; posn; posn = posn->next) { |
| if (posn->symref) |
| printf("@%s %s\n", posn->symref, posn->name); |
| else |
| printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name); |
| } |
| printf("\n"); |
| fflush(stdout); |
| } |
| |
| struct rpc_state { |
| const char *service_name; |
| const char **argv; |
| struct strbuf *stdin_preamble; |
| char *service_url; |
| char *hdr_content_type; |
| char *hdr_accept; |
| char *protocol_header; |
| char *buf; |
| size_t alloc; |
| size_t len; |
| size_t pos; |
| int in; |
| int out; |
| int any_written; |
| struct strbuf result; |
| unsigned gzip_request : 1; |
| unsigned initial_buffer : 1; |
| }; |
| |
| static size_t rpc_out(void *ptr, size_t eltsize, |
| size_t nmemb, void *buffer_) |
| { |
| size_t max = eltsize * nmemb; |
| struct rpc_state *rpc = buffer_; |
| size_t avail = rpc->len - rpc->pos; |
| |
| if (!avail) { |
| rpc->initial_buffer = 0; |
| avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0); |
| if (!avail) |
| return 0; |
| rpc->pos = 0; |
| rpc->len = avail; |
| } |
| |
| if (max < avail) |
| avail = max; |
| memcpy(ptr, rpc->buf + rpc->pos, avail); |
| rpc->pos += avail; |
| return avail; |
| } |
| |
| #ifndef NO_CURL_IOCTL |
| static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp) |
| { |
| struct rpc_state *rpc = clientp; |
| |
| switch (cmd) { |
| case CURLIOCMD_NOP: |
| return CURLIOE_OK; |
| |
| case CURLIOCMD_RESTARTREAD: |
| if (rpc->initial_buffer) { |
| rpc->pos = 0; |
| return CURLIOE_OK; |
| } |
| error("unable to rewind rpc post data - try increasing http.postBuffer"); |
| return CURLIOE_FAILRESTART; |
| |
| default: |
| return CURLIOE_UNKNOWNCMD; |
| } |
| } |
| #endif |
| |
| struct rpc_in_data { |
| struct rpc_state *rpc; |
| struct active_request_slot *slot; |
| }; |
| |
| /* |
| * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed |
| * from ptr. |
| */ |
| static size_t rpc_in(char *ptr, size_t eltsize, |
| size_t nmemb, void *buffer_) |
| { |
| size_t size = eltsize * nmemb; |
| struct rpc_in_data *data = buffer_; |
| long response_code; |
| |
| if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE, |
| &response_code) != CURLE_OK) |
| return size; |
| if (response_code >= 300) |
| return size; |
| if (size) |
| data->rpc->any_written = 1; |
| write_or_die(data->rpc->in, ptr, size); |
| return size; |
| } |
| |
| static int run_slot(struct active_request_slot *slot, |
| struct slot_results *results) |
| { |
| int err; |
| struct slot_results results_buf; |
| |
| if (!results) |
| results = &results_buf; |
| |
| err = run_one_slot(slot, results); |
| |
| if (err != HTTP_OK && err != HTTP_REAUTH) { |
| struct strbuf msg = STRBUF_INIT; |
| if (results->http_code && results->http_code != 200) |
| strbuf_addf(&msg, "HTTP %ld", results->http_code); |
| if (results->curl_result != CURLE_OK) { |
| if (msg.len) |
| strbuf_addch(&msg, ' '); |
| strbuf_addf(&msg, "curl %d", results->curl_result); |
| if (curl_errorstr[0]) { |
| strbuf_addch(&msg, ' '); |
| strbuf_addstr(&msg, curl_errorstr); |
| } |
| } |
| error("RPC failed; %s", msg.buf); |
| strbuf_release(&msg); |
| } |
| |
| return err; |
| } |
| |
| static int probe_rpc(struct rpc_state *rpc, struct slot_results *results) |
| { |
| struct active_request_slot *slot; |
| struct curl_slist *headers = http_copy_default_headers(); |
| struct strbuf buf = STRBUF_INIT; |
| int err; |
| |
| slot = get_active_slot(); |
| |
| headers = curl_slist_append(headers, rpc->hdr_content_type); |
| headers = curl_slist_append(headers, rpc->hdr_accept); |
| |
| curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); |
| curl_easy_setopt(slot->curl, CURLOPT_POST, 1); |
| curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); |
| curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL); |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000"); |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4); |
| curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); |
| curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); |
| curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf); |
| |
| err = run_slot(slot, results); |
| |
| curl_slist_free_all(headers); |
| strbuf_release(&buf); |
| return err; |
| } |
| |
| static curl_off_t xcurl_off_t(size_t len) |
| { |
| uintmax_t size = len; |
| if (size > maximum_signed_value_of_type(curl_off_t)) |
| die("cannot handle pushes this big"); |
| return (curl_off_t)size; |
| } |
| |
| static int post_rpc(struct rpc_state *rpc) |
| { |
| struct active_request_slot *slot; |
| struct curl_slist *headers = http_copy_default_headers(); |
| int use_gzip = rpc->gzip_request; |
| char *gzip_body = NULL; |
| size_t gzip_size = 0; |
| int err, large_request = 0; |
| int needs_100_continue = 0; |
| struct rpc_in_data rpc_in_data; |
| |
| /* Try to load the entire request, if we can fit it into the |
| * allocated buffer space we can use HTTP/1.0 and avoid the |
| * chunked encoding mess. |
| */ |
| while (1) { |
| size_t left = rpc->alloc - rpc->len; |
| char *buf = rpc->buf + rpc->len; |
| int n; |
| |
| if (left < LARGE_PACKET_MAX) { |
| large_request = 1; |
| use_gzip = 0; |
| break; |
| } |
| |
| n = packet_read(rpc->out, NULL, NULL, buf, left, 0); |
| if (!n) |
| break; |
| rpc->len += n; |
| } |
| |
| if (large_request) { |
| struct slot_results results; |
| |
| do { |
| err = probe_rpc(rpc, &results); |
| if (err == HTTP_REAUTH) |
| credential_fill(&http_auth); |
| } while (err == HTTP_REAUTH); |
| if (err != HTTP_OK) |
| return -1; |
| |
| if (results.auth_avail & CURLAUTH_GSSNEGOTIATE) |
| needs_100_continue = 1; |
| } |
| |
| headers = curl_slist_append(headers, rpc->hdr_content_type); |
| headers = curl_slist_append(headers, rpc->hdr_accept); |
| headers = curl_slist_append(headers, needs_100_continue ? |
| "Expect: 100-continue" : "Expect:"); |
| |
| /* Add the extra Git-Protocol header */ |
| if (rpc->protocol_header) |
| headers = curl_slist_append(headers, rpc->protocol_header); |
| |
| retry: |
| slot = get_active_slot(); |
| |
| curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); |
| curl_easy_setopt(slot->curl, CURLOPT_POST, 1); |
| curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); |
| curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); |
| |
| if (large_request) { |
| /* The request body is large and the size cannot be predicted. |
| * We must use chunked encoding to send it. |
| */ |
| headers = curl_slist_append(headers, "Transfer-Encoding: chunked"); |
| rpc->initial_buffer = 1; |
| curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out); |
| curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc); |
| #ifndef NO_CURL_IOCTL |
| curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl); |
| curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc); |
| #endif |
| if (options.verbosity > 1) { |
| fprintf(stderr, "POST %s (chunked)\n", rpc->service_name); |
| fflush(stderr); |
| } |
| |
| } else if (gzip_body) { |
| /* |
| * If we are looping to retry authentication, then the previous |
| * run will have set up the headers and gzip buffer already, |
| * and we just need to send it. |
| */ |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body); |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size)); |
| |
| } else if (use_gzip && 1024 < rpc->len) { |
| /* The client backend isn't giving us compressed data so |
| * we can try to deflate it ourselves, this may save on |
| * the transfer time. |
| */ |
| git_zstream stream; |
| int ret; |
| |
| git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION); |
| gzip_size = git_deflate_bound(&stream, rpc->len); |
| gzip_body = xmalloc(gzip_size); |
| |
| stream.next_in = (unsigned char *)rpc->buf; |
| stream.avail_in = rpc->len; |
| stream.next_out = (unsigned char *)gzip_body; |
| stream.avail_out = gzip_size; |
| |
| ret = git_deflate(&stream, Z_FINISH); |
| if (ret != Z_STREAM_END) |
| die("cannot deflate request; zlib deflate error %d", ret); |
| |
| ret = git_deflate_end_gently(&stream); |
| if (ret != Z_OK) |
| die("cannot deflate request; zlib end error %d", ret); |
| |
| gzip_size = stream.total_out; |
| |
| headers = curl_slist_append(headers, "Content-Encoding: gzip"); |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body); |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size)); |
| |
| if (options.verbosity > 1) { |
| fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n", |
| rpc->service_name, |
| (unsigned long)rpc->len, (unsigned long)gzip_size); |
| fflush(stderr); |
| } |
| } else { |
| /* We know the complete request size in advance, use the |
| * more normal Content-Length approach. |
| */ |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf); |
| curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len)); |
| if (options.verbosity > 1) { |
| fprintf(stderr, "POST %s (%lu bytes)\n", |
| rpc->service_name, (unsigned long)rpc->len); |
| fflush(stderr); |
| } |
| } |
| |
| curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); |
| curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in); |
| rpc_in_data.rpc = rpc; |
| rpc_in_data.slot = slot; |
| curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data); |
| curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); |
| |
| |
| rpc->any_written = 0; |
| err = run_slot(slot, NULL); |
| if (err == HTTP_REAUTH && !large_request) { |
| credential_fill(&http_auth); |
| goto retry; |
| } |
| if (err != HTTP_OK) |
| err = -1; |
| |
| if (!rpc->any_written) |
| err = -1; |
| |
| curl_slist_free_all(headers); |
| free(gzip_body); |
| return err; |
| } |
| |
| static int rpc_service(struct rpc_state *rpc, struct discovery *heads) |
| { |
| const char *svc = rpc->service_name; |
| struct strbuf buf = STRBUF_INIT; |
| struct strbuf *preamble = rpc->stdin_preamble; |
| struct child_process client = CHILD_PROCESS_INIT; |
| int err = 0; |
| |
| client.in = -1; |
| client.out = -1; |
| client.git_cmd = 1; |
| client.argv = rpc->argv; |
| if (start_command(&client)) |
| exit(1); |
| if (preamble) |
| write_or_die(client.in, preamble->buf, preamble->len); |
| if (heads) |
| write_or_die(client.in, heads->buf, heads->len); |
| |
| rpc->alloc = http_post_buffer; |
| rpc->buf = xmalloc(rpc->alloc); |
| rpc->in = client.in; |
| rpc->out = client.out; |
| strbuf_init(&rpc->result, 0); |
| |
| strbuf_addf(&buf, "%s%s", url.buf, svc); |
| rpc->service_url = strbuf_detach(&buf, NULL); |
| |
| strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc); |
| rpc->hdr_content_type = strbuf_detach(&buf, NULL); |
| |
| strbuf_addf(&buf, "Accept: application/x-%s-result", svc); |
| rpc->hdr_accept = strbuf_detach(&buf, NULL); |
| |
| if (get_protocol_http_header(heads->version, &buf)) |
| rpc->protocol_header = strbuf_detach(&buf, NULL); |
| else |
| rpc->protocol_header = NULL; |
| |
| while (!err) { |
| int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0); |
| if (!n) |
| break; |
| rpc->pos = 0; |
| rpc->len = n; |
| err |= post_rpc(rpc); |
| } |
| |
| close(client.in); |
| client.in = -1; |
| if (!err) { |
| strbuf_read(&rpc->result, client.out, 0); |
| } else { |
| char buf[4096]; |
| for (;;) |
| if (xread(client.out, buf, sizeof(buf)) <= 0) |
| break; |
| } |
| |
| close(client.out); |
| client.out = -1; |
| |
| err |= finish_command(&client); |
| free(rpc->service_url); |
| free(rpc->hdr_content_type); |
| free(rpc->hdr_accept); |
| free(rpc->protocol_header); |
| free(rpc->buf); |
| strbuf_release(&buf); |
| return err; |
| } |
| |
| static int fetch_dumb(int nr_heads, struct ref **to_fetch) |
| { |
| struct walker *walker; |
| char **targets; |
| int ret, i; |
| |
| ALLOC_ARRAY(targets, nr_heads); |
| if (options.depth || options.deepen_since) |
| die("dumb http transport does not support shallow capabilities"); |
| for (i = 0; i < nr_heads; i++) |
| targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid)); |
| |
| walker = get_http_walker(url.buf); |
| walker->get_verbosely = options.verbosity >= 3; |
| walker->get_recover = 0; |
| ret = walker_fetch(walker, nr_heads, targets, NULL, NULL); |
| walker_free(walker); |
| |
| for (i = 0; i < nr_heads; i++) |
| free(targets[i]); |
| free(targets); |
| |
| return ret ? error("fetch failed.") : 0; |
| } |
| |
| static int fetch_git(struct discovery *heads, |
| int nr_heads, struct ref **to_fetch) |
| { |
| struct rpc_state rpc; |
| struct strbuf preamble = STRBUF_INIT; |
| int i, err; |
| struct argv_array args = ARGV_ARRAY_INIT; |
| |
| argv_array_pushl(&args, "fetch-pack", "--stateless-rpc", |
| "--stdin", "--lock-pack", NULL); |
| if (options.followtags) |
| argv_array_push(&args, "--include-tag"); |
| if (options.thin) |
| argv_array_push(&args, "--thin"); |
| if (options.verbosity >= 3) |
| argv_array_pushl(&args, "-v", "-v", NULL); |
| if (options.check_self_contained_and_connected) |
| argv_array_push(&args, "--check-self-contained-and-connected"); |
| if (options.cloning) |
| argv_array_push(&args, "--cloning"); |
| if (options.update_shallow) |
| argv_array_push(&args, "--update-shallow"); |
| if (!options.progress) |
| argv_array_push(&args, "--no-progress"); |
| if (options.depth) |
| argv_array_pushf(&args, "--depth=%lu", options.depth); |
| if (options.deepen_since) |
| argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since); |
| for (i = 0; i < options.deepen_not.nr; i++) |
| argv_array_pushf(&args, "--shallow-exclude=%s", |
| options.deepen_not.items[i].string); |
| if (options.deepen_relative && options.depth) |
| argv_array_push(&args, "--deepen-relative"); |
| if (options.from_promisor) |
| argv_array_push(&args, "--from-promisor"); |
| if (options.no_dependents) |
| argv_array_push(&args, "--no-dependents"); |
| if (options.filter) |
| argv_array_pushf(&args, "--filter=%s", options.filter); |
| argv_array_push(&args, url.buf); |
| |
| for (i = 0; i < nr_heads; i++) { |
| struct ref *ref = to_fetch[i]; |
| if (!*ref->name) |
| die("cannot fetch by sha1 over smart http"); |
| packet_buf_write(&preamble, "%s %s\n", |
| oid_to_hex(&ref->old_oid), ref->name); |
| } |
| packet_buf_flush(&preamble); |
| |
| memset(&rpc, 0, sizeof(rpc)); |
| rpc.service_name = "git-upload-pack", |
| rpc.argv = args.argv; |
| rpc.stdin_preamble = &preamble; |
| rpc.gzip_request = 1; |
| |
| err = rpc_service(&rpc, heads); |
| if (rpc.result.len) |
| write_or_die(1, rpc.result.buf, rpc.result.len); |
| strbuf_release(&rpc.result); |
| strbuf_release(&preamble); |
| argv_array_clear(&args); |
| return err; |
| } |
| |
| static int fetch(int nr_heads, struct ref **to_fetch) |
| { |
| struct discovery *d = discover_refs("git-upload-pack", 0); |
| if (d->proto_git) |
| return fetch_git(d, nr_heads, to_fetch); |
| else |
| return fetch_dumb(nr_heads, to_fetch); |
| } |
| |
| static void parse_fetch(struct strbuf *buf) |
| { |
| struct ref **to_fetch = NULL; |
| struct ref *list_head = NULL; |
| struct ref **list = &list_head; |
| int alloc_heads = 0, nr_heads = 0; |
| |
| do { |
| const char *p; |
| if (skip_prefix(buf->buf, "fetch ", &p)) { |
| const char *name; |
| struct ref *ref; |
| struct object_id old_oid; |
| |
| if (get_oid_hex(p, &old_oid)) |
| die("protocol error: expected sha/ref, got %s'", p); |
| if (p[GIT_SHA1_HEXSZ] == ' ') |
| name = p + GIT_SHA1_HEXSZ + 1; |
| else if (!p[GIT_SHA1_HEXSZ]) |
| name = ""; |
| else |
| die("protocol error: expected sha/ref, got %s'", p); |
| |
| ref = alloc_ref(name); |
| oidcpy(&ref->old_oid, &old_oid); |
| |
| *list = ref; |
| list = &ref->next; |
| |
| ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads); |
| to_fetch[nr_heads++] = ref; |
| } |
| else |
| die("http transport does not support %s", buf->buf); |
| |
| strbuf_reset(buf); |
| if (strbuf_getline_lf(buf, stdin) == EOF) |
| return; |
| if (!*buf->buf) |
| break; |
| } while (1); |
| |
| if (fetch(nr_heads, to_fetch)) |
| exit(128); /* error already reported */ |
| free_refs(list_head); |
| free(to_fetch); |
| |
| printf("\n"); |
| fflush(stdout); |
| strbuf_reset(buf); |
| } |
| |
| static int push_dav(int nr_spec, char **specs) |
| { |
| struct child_process child = CHILD_PROCESS_INIT; |
| size_t i; |
| |
| child.git_cmd = 1; |
| argv_array_push(&child.args, "http-push"); |
| argv_array_push(&child.args, "--helper-status"); |
| if (options.dry_run) |
| argv_array_push(&child.args, "--dry-run"); |
| if (options.verbosity > 1) |
| argv_array_push(&child.args, "--verbose"); |
| argv_array_push(&child.args, url.buf); |
| for (i = 0; i < nr_spec; i++) |
| argv_array_push(&child.args, specs[i]); |
| |
| if (run_command(&child)) |
| die("git-http-push failed"); |
| return 0; |
| } |
| |
| static int push_git(struct discovery *heads, int nr_spec, char **specs) |
| { |
| struct rpc_state rpc; |
| int i, err; |
| struct argv_array args; |
| struct string_list_item *cas_option; |
| struct strbuf preamble = STRBUF_INIT; |
| |
| argv_array_init(&args); |
| argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status", |
| NULL); |
| |
| if (options.thin) |
| argv_array_push(&args, "--thin"); |
| if (options.dry_run) |
| argv_array_push(&args, "--dry-run"); |
| if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS) |
| argv_array_push(&args, "--signed=yes"); |
| else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) |
| argv_array_push(&args, "--signed=if-asked"); |
| if (options.verbosity == 0) |
| argv_array_push(&args, "--quiet"); |
| else if (options.verbosity > 1) |
| argv_array_push(&args, "--verbose"); |
| for (i = 0; i < options.push_options.nr; i++) |
| argv_array_pushf(&args, "--push-option=%s", |
| options.push_options.items[i].string); |
| argv_array_push(&args, options.progress ? "--progress" : "--no-progress"); |
| for_each_string_list_item(cas_option, &cas_options) |
| argv_array_push(&args, cas_option->string); |
| argv_array_push(&args, url.buf); |
| |
| argv_array_push(&args, "--stdin"); |
| for (i = 0; i < nr_spec; i++) |
| packet_buf_write(&preamble, "%s\n", specs[i]); |
| packet_buf_flush(&preamble); |
| |
| memset(&rpc, 0, sizeof(rpc)); |
| rpc.service_name = "git-receive-pack", |
| rpc.argv = args.argv; |
| rpc.stdin_preamble = &preamble; |
| |
| err = rpc_service(&rpc, heads); |
| if (rpc.result.len) |
| write_or_die(1, rpc.result.buf, rpc.result.len); |
| strbuf_release(&rpc.result); |
| strbuf_release(&preamble); |
| argv_array_clear(&args); |
| return err; |
| } |
| |
| static int push(int nr_spec, char **specs) |
| { |
| struct discovery *heads = discover_refs("git-receive-pack", 1); |
| int ret; |
| |
| if (heads->proto_git) |
| ret = push_git(heads, nr_spec, specs); |
| else |
| ret = push_dav(nr_spec, specs); |
| free_discovery(heads); |
| return ret; |
| } |
| |
| static void parse_push(struct strbuf *buf) |
| { |
| char **specs = NULL; |
| int alloc_spec = 0, nr_spec = 0, i, ret; |
| |
| do { |
| if (starts_with(buf->buf, "push ")) { |
| ALLOC_GROW(specs, nr_spec + 1, alloc_spec); |
| specs[nr_spec++] = xstrdup(buf->buf + 5); |
| } |
| else |
| die("http transport does not support %s", buf->buf); |
| |
| strbuf_reset(buf); |
| if (strbuf_getline_lf(buf, stdin) == EOF) |
| goto free_specs; |
| if (!*buf->buf) |
| break; |
| } while (1); |
| |
| ret = push(nr_spec, specs); |
| printf("\n"); |
| fflush(stdout); |
| |
| if (ret) |
| exit(128); /* error already reported */ |
| |
| free_specs: |
| for (i = 0; i < nr_spec; i++) |
| free(specs[i]); |
| free(specs); |
| } |
| |
| /* |
| * Used to represent the state of a connection to an HTTP server when |
| * communicating using git's wire-protocol version 2. |
| */ |
| struct proxy_state { |
| char *service_name; |
| char *service_url; |
| struct curl_slist *headers; |
| struct strbuf request_buffer; |
| int in; |
| int out; |
| struct packet_reader reader; |
| size_t pos; |
| int seen_flush; |
| }; |
| |
| static void proxy_state_init(struct proxy_state *p, const char *service_name, |
| enum protocol_version version) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| |
| memset(p, 0, sizeof(*p)); |
| p->service_name = xstrdup(service_name); |
| |
| p->in = 0; |
| p->out = 1; |
| strbuf_init(&p->request_buffer, 0); |
| |
| strbuf_addf(&buf, "%s%s", url.buf, p->service_name); |
| p->service_url = strbuf_detach(&buf, NULL); |
| |
| p->headers = http_copy_default_headers(); |
| |
| strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name); |
| p->headers = curl_slist_append(p->headers, buf.buf); |
| strbuf_reset(&buf); |
| |
| strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name); |
| p->headers = curl_slist_append(p->headers, buf.buf); |
| strbuf_reset(&buf); |
| |
| p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked"); |
| |
| /* Add the Git-Protocol header */ |
| if (get_protocol_http_header(version, &buf)) |
| p->headers = curl_slist_append(p->headers, buf.buf); |
| |
| packet_reader_init(&p->reader, p->in, NULL, 0, |
| PACKET_READ_GENTLE_ON_EOF | |
| PACKET_READ_DIE_ON_ERR_PACKET); |
| |
| strbuf_release(&buf); |
| } |
| |
| static void proxy_state_clear(struct proxy_state *p) |
| { |
| free(p->service_name); |
| free(p->service_url); |
| curl_slist_free_all(p->headers); |
| strbuf_release(&p->request_buffer); |
| } |
| |
| /* |
| * CURLOPT_READFUNCTION callback function. |
| * Attempts to copy over a single packet-line at a time into the |
| * curl provided buffer. |
| */ |
| static size_t proxy_in(char *buffer, size_t eltsize, |
| size_t nmemb, void *userdata) |
| { |
| size_t max; |
| struct proxy_state *p = userdata; |
| size_t avail = p->request_buffer.len - p->pos; |
| |
| |
| if (eltsize != 1) |
| BUG("curl read callback called with size = %"PRIuMAX" != 1", |
| (uintmax_t)eltsize); |
| max = nmemb; |
| |
| if (!avail) { |
| if (p->seen_flush) { |
| p->seen_flush = 0; |
| return 0; |
| } |
| |
| strbuf_reset(&p->request_buffer); |
| switch (packet_reader_read(&p->reader)) { |
| case PACKET_READ_EOF: |
| die("unexpected EOF when reading from parent process"); |
| case PACKET_READ_NORMAL: |
| packet_buf_write_len(&p->request_buffer, p->reader.line, |
| p->reader.pktlen); |
| break; |
| case PACKET_READ_DELIM: |
| packet_buf_delim(&p->request_buffer); |
| break; |
| case PACKET_READ_FLUSH: |
| packet_buf_flush(&p->request_buffer); |
| p->seen_flush = 1; |
| break; |
| } |
| p->pos = 0; |
| avail = p->request_buffer.len; |
| } |
| |
| if (max < avail) |
| avail = max; |
| memcpy(buffer, p->request_buffer.buf + p->pos, avail); |
| p->pos += avail; |
| return avail; |
| } |
| |
| static size_t proxy_out(char *buffer, size_t eltsize, |
| size_t nmemb, void *userdata) |
| { |
| size_t size; |
| struct proxy_state *p = userdata; |
| |
| if (eltsize != 1) |
| BUG("curl read callback called with size = %"PRIuMAX" != 1", |
| (uintmax_t)eltsize); |
| size = nmemb; |
| |
| write_or_die(p->out, buffer, size); |
| return size; |
| } |
| |
| /* Issues a request to the HTTP server configured in `p` */ |
| static int proxy_request(struct proxy_state *p) |
| { |
| struct active_request_slot *slot; |
| |
| slot = get_active_slot(); |
| |
| curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); |
| curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); |
| curl_easy_setopt(slot->curl, CURLOPT_POST, 1); |
| curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url); |
| curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers); |
| |
| /* Setup function to read request from client */ |
| curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in); |
| curl_easy_setopt(slot->curl, CURLOPT_READDATA, p); |
| |
| /* Setup function to write server response to client */ |
| curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out); |
| curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p); |
| |
| if (run_slot(slot, NULL) != HTTP_OK) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int stateless_connect(const char *service_name) |
| { |
| struct discovery *discover; |
| struct proxy_state p; |
| |
| /* |
| * Run the info/refs request and see if the server supports protocol |
| * v2. If and only if the server supports v2 can we successfully |
| * establish a stateless connection, otherwise we need to tell the |
| * client to fallback to using other transport helper functions to |
| * complete their request. |
| */ |
| discover = discover_refs(service_name, 0); |
| if (discover->version != protocol_v2) { |
| printf("fallback\n"); |
| fflush(stdout); |
| return -1; |
| } else { |
| /* Stateless Connection established */ |
| printf("\n"); |
| fflush(stdout); |
| } |
| |
| proxy_state_init(&p, service_name, discover->version); |
| |
| /* |
| * Dump the capability listing that we got from the server earlier |
| * during the info/refs request. |
| */ |
| write_or_die(p.out, discover->buf, discover->len); |
| |
| /* Peek the next packet line. Until we see EOF keep sending POSTs */ |
| while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) { |
| if (proxy_request(&p)) { |
| /* We would have an err here */ |
| break; |
| } |
| } |
| |
| proxy_state_clear(&p); |
| return 0; |
| } |
| |
| int cmd_main(int argc, const char **argv) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| int nongit; |
| |
| setup_git_directory_gently(&nongit); |
| if (argc < 2) { |
| error("remote-curl: usage: git remote-curl <remote> [<url>]"); |
| return 1; |
| } |
| |
| options.verbosity = 1; |
| options.progress = !!isatty(2); |
| options.thin = 1; |
| string_list_init(&options.deepen_not, 1); |
| string_list_init(&options.push_options, 1); |
| |
| remote = remote_get(argv[1]); |
| |
| if (argc > 2) { |
| end_url_with_slash(&url, argv[2]); |
| } else { |
| end_url_with_slash(&url, remote->url[0]); |
| } |
| |
| http_init(remote, url.buf, 0); |
| |
| do { |
| const char *arg; |
| |
| if (strbuf_getline_lf(&buf, stdin) == EOF) { |
| if (ferror(stdin)) |
| error("remote-curl: error reading command stream from git"); |
| return 1; |
| } |
| if (buf.len == 0) |
| break; |
| if (starts_with(buf.buf, "fetch ")) { |
| if (nongit) |
| die("remote-curl: fetch attempted without a local repo"); |
| parse_fetch(&buf); |
| |
| } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) { |
| int for_push = !!strstr(buf.buf + 4, "for-push"); |
| output_refs(get_refs(for_push)); |
| |
| } else if (starts_with(buf.buf, "push ")) { |
| parse_push(&buf); |
| |
| } else if (skip_prefix(buf.buf, "option ", &arg)) { |
| char *value = strchr(arg, ' '); |
| int result; |
| |
| if (value) |
| *value++ = '\0'; |
| else |
| value = "true"; |
| |
| result = set_option(arg, value); |
| if (!result) |
| printf("ok\n"); |
| else if (result < 0) |
| printf("error invalid value\n"); |
| else |
| printf("unsupported\n"); |
| fflush(stdout); |
| |
| } else if (!strcmp(buf.buf, "capabilities")) { |
| printf("stateless-connect\n"); |
| printf("fetch\n"); |
| printf("option\n"); |
| printf("push\n"); |
| printf("check-connectivity\n"); |
| printf("\n"); |
| fflush(stdout); |
| } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) { |
| if (!stateless_connect(arg)) |
| break; |
| } else { |
| error("remote-curl: unknown command '%s' from git", buf.buf); |
| return 1; |
| } |
| strbuf_reset(&buf); |
| } while (1); |
| |
| http_cleanup(); |
| |
| return 0; |
| } |