protocol-caps.c

   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 "strvec.h"
   7 #include "hash-ll.h"
   8 #include "hex.h"
   9 #include "object.h"
  10 #include "object-store.h"
  11 #include "string-list.h"
  12 #include "strbuf.h"
  13
  14 struct requested_info {
  15         unsigned size : 1;
  16 };
  17
  18 /*
  19  * Parses oids from the given line and collects them in the given
  20  * oid_str_list. Returns 1 if parsing was successful and 0 otherwise.
  21  */
  22 static int parse_oid(const char *line, struct string_list *oid_str_list)
  23 {
  24         const char *arg;
  25
  26         if (!skip_prefix(line, "oid ", &arg))
  27                 return 0;
  28
  29         string_list_append(oid_str_list, arg);
  30
  31         return 1;
  32 }
  33
  34 /*
  35  * Validates and send requested info back to the client. Any errors detected
  36  * are returned as they are detected.
  37  */
  38 static void send_info(struct repository *r, struct packet_writer *writer,
  39                       struct string_list *oid_str_list,
  40                       struct requested_info *info)
  41 {
  42         struct string_list_item *item;
  43         struct strbuf send_buffer = STRBUF_INIT;
  44
  45         if (!oid_str_list->nr)
  46                 return;
  47
  48         if (info->size)
  49                 packet_writer_write(writer, "size");
  50
  51         for_each_string_list_item (item, oid_str_list) {
  52                 const char *oid_str = item->string;
  53                 struct object_id oid;
  54                 unsigned long object_size;
  55
  56                 if (get_oid_hex(oid_str, &oid) < 0) {
  57                         packet_writer_error(
  58                                 writer,
  59                                 "object-info: protocol error, expected to get oid, not '%s'",
  60                                 oid_str);
  61                         continue;
  62                 }
  63
  64                 strbuf_addstr(&send_buffer, oid_str);
  65
  66                 if (info->size) {
  67                         if (oid_object_info(r, &oid, &object_size) < 0) {
  68                                 strbuf_addstr(&send_buffer, " ");
  69                         } else {
  70                                 strbuf_addf(&send_buffer, " %lu", object_size);
  71                         }
  72                 }
  73
  74                 packet_writer_write(writer, "%s", send_buffer.buf);
  75                 strbuf_reset(&send_buffer);
  76         }
  77         strbuf_release(&send_buffer);
  78 }
  79
  80 int cap_object_info(struct repository *r, struct packet_reader *request)
  81 {
  82         struct requested_info info = { 0 };
  83         struct packet_writer writer;
  84         struct string_list oid_str_list = STRING_LIST_INIT_DUP;
  85
  86         packet_writer_init(&writer, 1);
  87
  88         while (packet_reader_read(request) == PACKET_READ_NORMAL) {
  89                 if (!strcmp("size", request->line)) {
  90                         info.size = 1;
  91                         continue;
  92                 }
  93
  94                 if (parse_oid(request->line, &oid_str_list))
  95                         continue;
  96
  97                 packet_writer_error(&writer,
  98                                     "object-info: unexpected line: '%s'",
  99                                     request->line);
 100         }
 101
 102         if (request->status != PACKET_READ_FLUSH) {
 103                 packet_writer_error(
 104                         &writer, "object-info: expected flush after arguments");
 105                 die(_("object-info: expected flush after arguments"));
 106         }
 107
 108         send_info(r, &writer, &oid_str_list, &info);
 109
 110         string_list_clear(&oid_str_list, 1);
 111
 112         packet_flush(1);
 113
 114         return 0;
 115 }