ui-blob.c

   1 /* ui-blob.c: show blob content
   2  *
   3  * Copyright (C) 2008 Lars Hjemli
   4  * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
   5  *
   6  * Licensed under GNU General Public License v2
   7  *   (see COPYING for full license text)
   8  */
   9
  10 #include "cgit.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13
  14 static char *match_path;
  15 static unsigned char *matched_sha1;
  16 static int found_path;
  17
  18 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
  19         const char *pathname, unsigned mode, int stage, void *cbdata) {
  20         if(strncmp(base, match_path, baselen)
  21                 || strcmp(match_path + baselen, pathname))
  22                 return READ_TREE_RECURSIVE;
  23         memmove(matched_sha1, sha1, 20);
  24         found_path = 1;
  25         return 0;
  26 }
  27
  28 int cgit_print_file(char *path, const char *head)
  29 {
  30         unsigned char sha1[20];
  31         enum object_type type;
  32         char *buf;
  33         unsigned long size;
  34         struct commit *commit;
  35         struct pathspec_item path_items = {
  36                 .match = path,
  37                 .len = strlen(path)
  38         };
  39         struct pathspec paths = {
  40                 .nr = 1,
  41                 .items = &path_items
  42         };
  43         if (get_sha1(head, sha1))
  44                 return -1;
  45         type = sha1_object_info(sha1, &size);
  46         if(type == OBJ_COMMIT && path) {
  47                 commit = lookup_commit_reference(sha1);
  48                 match_path = path;
  49                 matched_sha1 = sha1;
  50                 found_path = 0;
  51                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, NULL);
  52                 if (!found_path)
  53                         return -1;
  54                 type = sha1_object_info(sha1, &size);
  55         }
  56         if (type == OBJ_BAD)
  57                 return -1;
  58         buf = read_sha1_file(sha1, &type, &size);
  59         if (!buf)
  60                 return -1;
  61         buf[size] = '\0';
  62         html_raw(buf, size);
  63         return 0;
  64 }
  65
  66 void cgit_print_blob(const char *hex, char *path, const char *head)
  67 {
  68         unsigned char sha1[20];
  69         enum object_type type;
  70         char *buf;
  71         unsigned long size;
  72         struct commit *commit;
  73         struct pathspec_item path_items = {
  74                 .match = path,
  75                 .len = strlen(path)
  76         };
  77         struct pathspec paths = {
  78                 .nr = 1,
  79                 .items = &path_items
  80         };
  81
  82         if (hex) {
  83                 if (get_sha1_hex(hex, sha1)){
  84                         cgit_print_error(fmt("Bad hex value: %s", hex));
  85                         return;
  86                 }
  87         } else {
  88                 if (get_sha1(head, sha1)) {
  89                         cgit_print_error(fmt("Bad ref: %s", head));
  90                         return;
  91                 }
  92         }
  93
  94         type = sha1_object_info(sha1, &size);
  95
  96         if((!hex) && type == OBJ_COMMIT && path) {
  97                 commit = lookup_commit_reference(sha1);
  98                 match_path = path;
  99                 matched_sha1 = sha1;
 100                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, NULL);
 101                 type = sha1_object_info(sha1,&size);
 102         }
 103
 104         if (type == OBJ_BAD) {
 105                 cgit_print_error(fmt("Bad object name: %s", hex));
 106                 return;
 107         }
 108
 109         buf = read_sha1_file(sha1, &type, &size);
 110         if (!buf) {
 111                 cgit_print_error(fmt("Error reading object %s", hex));
 112                 return;
 113         }
 114
 115         buf[size] = '\0';
 116         ctx.page.mimetype = ctx.qry.mimetype;
 117         if (!ctx.page.mimetype) {
 118                 if (buffer_is_binary(buf, size))
 119                         ctx.page.mimetype = "application/octet-stream";
 120                 else
 121                         ctx.page.mimetype = "text/plain";
 122         }
 123         ctx.page.filename = path;
 124         cgit_print_http_headers(&ctx);
 125         html_raw(buf, size);
 126 }