diff options
Diffstat (limited to 'third_party/git/remote-curl.c')
| -rw-r--r-- | third_party/git/remote-curl.c | 1556 |
1 files changed, 0 insertions, 1556 deletions
diff --git a/third_party/git/remote-curl.c b/third_party/git/remote-curl.c deleted file mode 100644 index 32cc4a0c553b..000000000000 --- a/third_party/git/remote-curl.c +++ /dev/null @@ -1,1556 +0,0 @@ -#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 "strvec.h" -#include "credential.h" -#include "oid-array.h" -#include "send-pack.h" -#include "protocol.h" -#include "quote.h" -#include "transport.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, - - /* see documentation of corresponding flag in fetch-pack.h */ - from_promisor : 1, - - atomic : 1, - object_format : 1; - const struct git_hash_algo *hash_algo; -}; -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_addstr(&val, "--force-with-lease="); - if (*value != '"') - strbuf_addstr(&val, value); - else if (unquote_c_style(&val, value, NULL)) - return -1; - 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, "atomic")) { - if (!strcmp(value, "true")) - options.atomic = 1; - else if (!strcmp(value, "false")) - options.atomic = 0; - 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: '%s'"), 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, "filter")) { - options.filter = xstrdup(value); - return 0; - } else if (!strcmp(name, "object-format")) { - int algo; - options.object_format = 1; - if (strcmp(value, "true")) { - algo = hash_algo_by_name(value); - if (algo == GIT_HASH_UNKNOWN) - die("unknown object format '%s'", value); - options.hash_algo = &hash_algos[algo]; - } - 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); - options.hash_algo = reader.hash_algo; - break; - case protocol_unknown_version: - BUG("unknown protocol version"); - } - - return list; -} - -static const struct git_hash_algo *detect_hash_algo(struct discovery *heads) -{ - const char *p = memchr(heads->buf, '\t', heads->len); - int algo; - if (!p) - return the_hash_algo; - - algo = hash_algo_by_length((p - heads->buf) / 2); - if (algo == GIT_HASH_UNKNOWN) - return NULL; - return &hash_algos[algo]; -} - -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; - - options.hash_algo = detect_hash_algo(heads); - if (!options.hash_algo) - die("%sinfo/refs not valid: could not determine hash algorithm; " - "is this a git repository?", - transport_anonymize_url(url.buf)); - - 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 != options.hash_algo->hexsz) - die(_("%sinfo/refs not valid: is this a git repository?"), - transport_anonymize_url(url.buf)); - data[i] = 0; - ref_name = mid + 1; - ref = alloc_ref(ref_name); - get_oid_hex_algop(start, &ref->old_oid, options.hash_algo); - 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"), - transport_anonymize_url(url.buf)); - case HTTP_NOAUTH: - show_http_message(&type, &charset, &buffer); - die(_("Authentication failed for '%s'"), - transport_anonymize_url(url.buf)); - default: - show_http_message(&type, &charset, &buffer); - die(_("unable to access '%s': %s"), - transport_anonymize_url(url.buf), curl_errorstr); - } - - if (options.verbosity && !starts_with(refs_url.buf, url.buf)) { - char *u = transport_anonymize_url(url.buf); - warning(_("redirecting to %s"), u); - free(u); - } - - 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; - if (options.object_format && options.hash_algo) { - printf(":object-format %s\n", options.hash_algo->name); - } - for (posn = refs; posn; posn = posn->next) { - if (posn->symref) - printf("@%s %s\n", posn->symref, posn->name); - else - printf("%s %s\n", hash_to_hex_algop(posn->old_oid.hash, - options.hash_algo), - posn->name); - } - printf("\n"); - fflush(stdout); -} - -struct rpc_state { - const char *service_name; - 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; - unsigned gzip_request : 1; - unsigned initial_buffer : 1; - - /* - * Whenever a pkt-line is read into buf, append the 4 characters - * denoting its length before appending the payload. - */ - unsigned write_line_lengths : 1; - - /* - * Used by rpc_out; initialize to 0. This is true if a flush has been - * read, but the corresponding line length (if write_line_lengths is - * true) and EOF have not been sent to libcurl. Since each flush marks - * the end of a request, each flush must be completely sent before any - * further reading occurs. - */ - unsigned flush_read_but_not_sent : 1; -}; - -/* - * Appends the result of reading from rpc->out to the string represented by - * rpc->buf and rpc->len if there is enough space. Returns 1 if there was - * enough space, 0 otherwise. - * - * If rpc->write_line_lengths is true, appends the line length as a 4-byte - * hexadecimal string before appending the result described above. - * - * Writes the total number of bytes appended into appended. - */ -static int rpc_read_from_out(struct rpc_state *rpc, int options, - size_t *appended, - enum packet_read_status *status) { - size_t left; - char *buf; - int pktlen_raw; - - if (rpc->write_line_lengths) { - left = rpc->alloc - rpc->len - 4; - buf = rpc->buf + rpc->len + 4; - } else { - left = rpc->alloc - rpc->len; - buf = rpc->buf + rpc->len; - } - - if (left < LARGE_PACKET_MAX) - return 0; - - *status = packet_read_with_status(rpc->out, NULL, NULL, buf, - left, &pktlen_raw, options); - if (*status != PACKET_READ_EOF) { - *appended = pktlen_raw + (rpc->write_line_lengths ? 4 : 0); - rpc->len += *appended; - } - - if (rpc->write_line_lengths) { - switch (*status) { - case PACKET_READ_EOF: - if (!(options & PACKET_READ_GENTLE_ON_EOF)) - die(_("shouldn't have EOF when not gentle on EOF")); - break; - case PACKET_READ_NORMAL: - set_packet_header(buf - 4, *appended); - break; - case PACKET_READ_DELIM: - memcpy(buf - 4, "0001", 4); - break; - case PACKET_READ_FLUSH: - memcpy(buf - 4, "0000", 4); - break; - case PACKET_READ_RESPONSE_END: - die(_("remote server sent stateless separator")); - } - } - - return 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; - enum packet_read_status status; - - if (!avail) { - rpc->initial_buffer = 0; - rpc->len = 0; - rpc->pos = 0; - if (!rpc->flush_read_but_not_sent) { - if (!rpc_read_from_out(rpc, 0, &avail, &status)) - BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX"); - if (status == PACKET_READ_FLUSH) - rpc->flush_read_but_not_sent = 1; - } - /* - * If flush_read_but_not_sent is true, we have already read one - * full request but have not fully sent it + EOF, which is why - * we need to refrain from reading. - */ - } - if (rpc->flush_read_but_not_sent) { - if (!avail) { - /* - * The line length either does not need to be sent at - * all or has already been completely sent. Now we can - * return 0, indicating EOF, meaning that the flush has - * been fully sent. - */ - rpc->flush_read_but_not_sent = 0; - return 0; - } - /* - * If avail is non-zero, the line length for the flush still - * hasn't been fully sent. Proceed with sending the line - * length. - */ - } - - 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 check_pktline_state { - char len_buf[4]; - int len_filled; - int remaining; -}; - -static void check_pktline(struct check_pktline_state *state, const char *ptr, size_t size) -{ - while (size) { - if (!state->remaining) { - int digits_remaining = 4 - state->len_filled; - if (digits_remaining > size) - digits_remaining = size; - memcpy(&state->len_buf[state->len_filled], ptr, digits_remaining); - state->len_filled += digits_remaining; - ptr += digits_remaining; - size -= digits_remaining; - - if (state->len_filled == 4) { - state->remaining = packet_length(state->len_buf); - if (state->remaining < 0) { - die(_("remote-curl: bad line length character: %.4s"), state->len_buf); - } else if (state->remaining == 2) { - die(_("remote-curl: unexpected response end packet")); - } else if (state->remaining < 4) { - state->remaining = 0; - } else { - state->remaining -= 4; - } - state->len_filled = 0; - } - } - - if (state->remaining) { - int remaining = state->remaining; - if (remaining > size) - remaining = size; - ptr += remaining; - size -= remaining; - state->remaining -= remaining; - } - } -} - -struct rpc_in_data { - struct rpc_state *rpc; - struct active_request_slot *slot; - int check_pktline; - struct check_pktline_state pktline_state; -}; - -/* - * 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; - if (data->check_pktline) - check_pktline(&data->pktline_state, ptr, size); - 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; -} - -/* - * If flush_received is true, do not attempt to read any more; just use what's - * in rpc->buf. - */ -static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_received) -{ - 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. - */ - if (!flush_received) { - while (1) { - size_t n; - enum packet_read_status status; - - if (!rpc_read_from_out(rpc, 0, &n, &status)) { - large_request = 1; - use_gzip = 0; - break; - } - if (status == PACKET_READ_FLUSH) - break; - } - } - - 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; - rpc_in_data.check_pktline = stateless_connect; - memset(&rpc_in_data.pktline_state, 0, sizeof(rpc_in_data.pktline_state)); - 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; - - if (rpc_in_data.pktline_state.len_filled) - err = error(_("%d bytes of length header were received"), rpc_in_data.pktline_state.len_filled); - if (rpc_in_data.pktline_state.remaining) - err = error(_("%d bytes of body are still expected"), rpc_in_data.pktline_state.remaining); - - if (stateless_connect) - packet_response_end(rpc->in); - - curl_slist_free_all(headers); - free(gzip_body); - return err; -} - -static int rpc_service(struct rpc_state *rpc, struct discovery *heads, - const char **client_argv, const struct strbuf *preamble, - struct strbuf *rpc_result) -{ - const char *svc = rpc->service_name; - struct strbuf buf = STRBUF_INIT; - struct child_process client = CHILD_PROCESS_INIT; - int err = 0; - - client.in = -1; - client.out = -1; - client.git_cmd = 1; - client.argv = client_argv; - if (start_command(&client)) - exit(1); - 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_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, 0, 0); - } - - 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_progress = options.progress; - 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 strvec args = STRVEC_INIT; - struct strbuf rpc_result = STRBUF_INIT; - - strvec_pushl(&args, "fetch-pack", "--stateless-rpc", - "--stdin", "--lock-pack", NULL); - if (options.followtags) - strvec_push(&args, "--include-tag"); - if (options.thin) - strvec_push(&args, "--thin"); - if (options.verbosity >= 3) - strvec_pushl(&args, "-v", "-v", NULL); - if (options.check_self_contained_and_connected) - strvec_push(&args, "--check-self-contained-and-connected"); - if (options.cloning) - strvec_push(&args, "--cloning"); - if (options.update_shallow) - strvec_push(&args, "--update-shallow"); - if (!options.progress) - strvec_push(&args, "--no-progress"); - if (options.depth) - strvec_pushf(&args, "--depth=%lu", options.depth); - if (options.deepen_since) - strvec_pushf(&args, "--shallow-since=%s", options.deepen_since); - for (i = 0; i < options.deepen_not.nr; i++) - strvec_pushf(&args, "--shallow-exclude=%s", - options.deepen_not.items[i].string); - if (options.deepen_relative && options.depth) - strvec_push(&args, "--deepen-relative"); - if (options.from_promisor) - strvec_push(&args, "--from-promisor"); - if (options.filter) - strvec_pushf(&args, "--filter=%s", options.filter); - strvec_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.gzip_request = 1; - - err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result); - if (rpc_result.len) - write_or_die(1, rpc_result.buf, rpc_result.len); - strbuf_release(&rpc_result); - strbuf_release(&preamble); - strvec_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; - const char *q; - - if (parse_oid_hex(p, &old_oid, &q)) - die(_("protocol error: expected sha/ref, got '%s'"), p); - if (*q == ' ') - name = q + 1; - else if (!*q) - 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, const char **specs) -{ - struct child_process child = CHILD_PROCESS_INIT; - size_t i; - - child.git_cmd = 1; - strvec_push(&child.args, "http-push"); - strvec_push(&child.args, "--helper-status"); - if (options.dry_run) - strvec_push(&child.args, "--dry-run"); - if (options.verbosity > 1) - strvec_push(&child.args, "--verbose"); - strvec_push(&child.args, url.buf); - for (i = 0; i < nr_spec; i++) - strvec_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, const char **specs) -{ - struct rpc_state rpc; - int i, err; - struct strvec args; - struct string_list_item *cas_option; - struct strbuf preamble = STRBUF_INIT; - struct strbuf rpc_result = STRBUF_INIT; - - strvec_init(&args); - strvec_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status", - NULL); - - if (options.thin) - strvec_push(&args, "--thin"); - if (options.dry_run) - strvec_push(&args, "--dry-run"); - if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS) - strvec_push(&args, "--signed=yes"); - else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) - strvec_push(&args, "--signed=if-asked"); - if (options.atomic) - strvec_push(&args, "--atomic"); - if (options.verbosity == 0) - strvec_push(&args, "--quiet"); - else if (options.verbosity > 1) - strvec_push(&args, "--verbose"); - for (i = 0; i < options.push_options.nr; i++) - strvec_pushf(&args, "--push-option=%s", - options.push_options.items[i].string); - strvec_push(&args, options.progress ? "--progress" : "--no-progress"); - for_each_string_list_item(cas_option, &cas_options) - strvec_push(&args, cas_option->string); - strvec_push(&args, url.buf); - - strvec_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", - - err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result); - if (rpc_result.len) - write_or_die(1, rpc_result.buf, rpc_result.len); - strbuf_release(&rpc_result); - strbuf_release(&preamble); - strvec_clear(&args); - return err; -} - -static int push(int nr_spec, const 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) -{ - struct strvec specs = STRVEC_INIT; - int ret; - - do { - const char *arg; - if (skip_prefix(buf->buf, "push ", &arg)) - strvec_push(&specs, arg); - 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(specs.nr, specs.v); - printf("\n"); - fflush(stdout); - - if (ret) - exit(128); /* error already reported */ - -free_specs: - strvec_clear(&specs); -} - -static int stateless_connect(const char *service_name) -{ - struct discovery *discover; - struct rpc_state rpc; - struct strbuf buf = STRBUF_INIT; - - /* - * 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); - } - - rpc.service_name = service_name; - rpc.service_url = xstrfmt("%s%s", url.buf, rpc.service_name); - rpc.hdr_content_type = xstrfmt("Content-Type: application/x-%s-request", rpc.service_name); - rpc.hdr_accept = xstrfmt("Accept: application/x-%s-result", rpc.service_name); - if (get_protocol_http_header(discover->version, &buf)) { - rpc.protocol_header = strbuf_detach(&buf, NULL); - } else { - rpc.protocol_header = NULL; - strbuf_release(&buf); - } - rpc.buf = xmalloc(http_post_buffer); - rpc.alloc = http_post_buffer; - rpc.len = 0; - rpc.pos = 0; - rpc.in = 1; - rpc.out = 0; - rpc.any_written = 0; - rpc.gzip_request = 1; - rpc.initial_buffer = 0; - rpc.write_line_lengths = 1; - rpc.flush_read_but_not_sent = 0; - - /* - * Dump the capability listing that we got from the server earlier - * during the info/refs request. - */ - write_or_die(rpc.in, discover->buf, discover->len); - - /* Until we see EOF keep sending POSTs */ - while (1) { - size_t avail; - enum packet_read_status status; - - if (!rpc_read_from_out(&rpc, PACKET_READ_GENTLE_ON_EOF, &avail, - &status)) - BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX"); - if (status == PACKET_READ_EOF) - break; - if (post_rpc(&rpc, 1, status == PACKET_READ_FLUSH)) - /* We would have an err here */ - break; - /* Reset the buffer for next request */ - rpc.len = 0; - } - - free(rpc.service_url); - free(rpc.hdr_content_type); - free(rpc.hdr_accept); - free(rpc.protocol_header); - free(rpc.buf); - strbuf_release(&buf); - - 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); - - /* - * Just report "remote-curl" here (folding all the various aliases - * ("git-remote-http", "git-remote-https", and etc.) here since they - * are all just copies of the same actual executable. - */ - trace2_cmd_name("remote-curl"); - - 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("object-format\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; -} |