| 1 | #include "git-compat-util.h" |
| 2 | #include "protocol-caps.h" |
| 3 | #include "gettext.h" |
| 4 | #include "hex.h" |
| 5 | #include "pkt-line.h" |
| 6 | #include "hash.h" |
| 7 | #include "object.h" |
| 8 | #include "odb.h" |
| 9 | #include "repository.h" |
| 10 | #include "string-list.h" |
| 11 | #include "strbuf.h" |
| 12 | |
| 13 | struct requested_info { |
| 14 | unsigned size : 1; |
| 15 | }; |
| 16 | |
| 17 | /* |
| 18 | * Parses oids from the given line and collects them in the given |
| 19 | * oid_str_list. Returns 1 if parsing was successful and 0 otherwise. |
| 20 | */ |
| 21 | static int parse_oid(const char *line, struct string_list *oid_str_list) |
| 22 | { |
| 23 | const char *arg; |
| 24 | |
| 25 | if (!skip_prefix(line, "oid ", &arg)) |
| 26 | return 0; |
| 27 | |
| 28 | string_list_append(oid_str_list, arg); |
| 29 | |
| 30 | return 1; |
| 31 | } |
| 32 | |
| 33 | /* |
| 34 | * odb_read_object_info_extended() wrapper. Similar to odb_read_object_info() |
| 35 | * but uses the flags: |
| 36 | * |
| 37 | * - OBJECT_INFO_SKIP_FETCH_OBJECT so a server won't fetch an object when a |
| 38 | * object-info request asks for an OID that it doesn't have. |
| 39 | * |
| 40 | * - OBJECT_INFO_QUICK to avoid re-scanning packs when the object is not found. |
| 41 | */ |
| 42 | static enum object_type get_object_info(struct object_database *odb, |
| 43 | const struct object_id *oid, |
| 44 | size_t *sizep) |
| 45 | { |
| 46 | enum object_type type; |
| 47 | struct object_info oi = OBJECT_INFO_INIT; |
| 48 | |
| 49 | oi.typep = &type; |
| 50 | oi.sizep = sizep; |
| 51 | if (odb_read_object_info_extended(odb, oid, &oi, |
| 52 | OBJECT_INFO_LOOKUP_REPLACE | |
| 53 | OBJECT_INFO_SKIP_FETCH_OBJECT | |
| 54 | OBJECT_INFO_QUICK) < 0) |
| 55 | return OBJ_BAD; |
| 56 | return type; |
| 57 | } |
| 58 | |
| 59 | /* |
| 60 | * Validates and send requested info back to the client. Any errors detected |
| 61 | * are returned as they are detected. |
| 62 | */ |
| 63 | static void send_info(struct repository *r, struct packet_writer *writer, |
| 64 | struct string_list *oid_str_list, |
| 65 | struct requested_info *info) |
| 66 | { |
| 67 | struct string_list_item *item; |
| 68 | struct strbuf send_buffer = STRBUF_INIT; |
| 69 | |
| 70 | if (!oid_str_list->nr) |
| 71 | return; |
| 72 | |
| 73 | if (info->size) |
| 74 | packet_writer_write(writer, "size"); |
| 75 | |
| 76 | for_each_string_list_item (item, oid_str_list) { |
| 77 | const char *oid_str = item->string; |
| 78 | struct object_id oid; |
| 79 | size_t object_size; |
| 80 | |
| 81 | if (get_oid_hex_algop(oid_str, &oid, r->hash_algo) < 0) { |
| 82 | packet_writer_error( |
| 83 | writer, |
| 84 | "object-info: protocol error, expected to get oid, not '%s'", |
| 85 | oid_str); |
| 86 | continue; |
| 87 | } |
| 88 | |
| 89 | strbuf_addstr(&send_buffer, oid_str); |
| 90 | |
| 91 | /* |
| 92 | * Check the existence of the object first. |
| 93 | * If an object is not recognized by the server append SP to |
| 94 | * the response. |
| 95 | */ |
| 96 | if (get_object_info(r->objects, &oid, &object_size) <= OBJ_NONE) { |
| 97 | strbuf_addstr(&send_buffer, " "); |
| 98 | goto write; |
| 99 | } |
| 100 | |
| 101 | if (info->size) { |
| 102 | strbuf_addf(&send_buffer, " %"PRIuMAX, |
| 103 | (uintmax_t)object_size); |
| 104 | } |
| 105 | |
| 106 | write: |
| 107 | packet_writer_write(writer, "%s", send_buffer.buf); |
| 108 | strbuf_reset(&send_buffer); |
| 109 | } |
| 110 | strbuf_release(&send_buffer); |
| 111 | } |
| 112 | |
| 113 | int cap_object_info(struct repository *r, struct packet_reader *request) |
| 114 | { |
| 115 | struct requested_info info = { 0 }; |
| 116 | struct packet_writer writer; |
| 117 | struct string_list oid_str_list = STRING_LIST_INIT_DUP; |
| 118 | |
| 119 | packet_writer_init(&writer, 1); |
| 120 | |
| 121 | while (packet_reader_read(request) == PACKET_READ_NORMAL) { |
| 122 | if (!strcmp("size", request->line)) { |
| 123 | info.size = 1; |
| 124 | continue; |
| 125 | } |
| 126 | |
| 127 | if (parse_oid(request->line, &oid_str_list)) |
| 128 | continue; |
| 129 | |
| 130 | packet_writer_error(&writer, |
| 131 | "object-info: unexpected line: '%s'", |
| 132 | request->line); |
| 133 | } |
| 134 | |
| 135 | if (request->status != PACKET_READ_FLUSH) { |
| 136 | packet_writer_error( |
| 137 | &writer, "object-info: expected flush after arguments"); |
| 138 | die(_("object-info: expected flush after arguments")); |
| 139 | } |
| 140 | |
| 141 | send_info(r, &writer, &oid_str_list, &info); |
| 142 | |
| 143 | string_list_clear(&oid_str_list, 1); |
| 144 | |
| 145 | packet_flush(1); |
| 146 | |
| 147 | return 0; |
| 148 | } |