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 struct walk_tree_context {
  15         char *match_path;
  16         unsigned char *matched_sha1;
  17         int found_path;
  18 };
  19
  20 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
  21         const char *pathname, unsigned mode, int stage, void *cbdata)
  22 {
  23         struct walk_tree_context *walk_tree_ctx = cbdata;
  24
  25         if (strncmp(base, walk_tree_ctx->match_path, baselen)
  26                 || strcmp(walk_tree_ctx->match_path + baselen, pathname))
  27                 return READ_TREE_RECURSIVE;
  28         memmove(walk_tree_ctx->matched_sha1, sha1, 20);
  29         walk_tree_ctx->found_path = 1;
  30         return 0;
  31 }
  32
  33 int cgit_print_file(char *path, const char *head)
  34 {
  35         unsigned char sha1[20];
  36         enum object_type type;
  37         char *buf;
  38         unsigned long size;
  39         struct commit *commit;
  40         struct pathspec_item path_items = {
  41                 .match = path,
  42                 .len = strlen(path)
  43         };
  44         struct pathspec paths = {
  45                 .nr = 1,
  46                 .items = &path_items
  47         };
  48         struct walk_tree_context walk_tree_ctx = {
  49                 .match_path = path,
  50                 .matched_sha1 = sha1,
  51                 .found_path = 0
  52         };
  53
  54         if (get_sha1(head, sha1))
  55                 return -1;
  56         type = sha1_object_info(sha1, &size);
  57         if (type == OBJ_COMMIT && path) {
  58                 commit = lookup_commit_reference(sha1);
  59                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  60                 if (!walk_tree_ctx.found_path)
  61                         return -1;
  62                 type = sha1_object_info(sha1, &size);
  63         }
  64         if (type == OBJ_BAD)
  65                 return -1;
  66         buf = read_sha1_file(sha1, &type, &size);
  67         if (!buf)
  68                 return -1;
  69         buf[size] = '\0';
  70         html_raw(buf, size);
  71         return 0;
  72 }
  73
  74 void cgit_print_blob(const char *hex, char *path, const char *head)
  75 {
  76         unsigned char sha1[20];
  77         enum object_type type;
  78         char *buf;
  79         unsigned long size;
  80         struct commit *commit;
  81         struct pathspec_item path_items = {
  82                 .match = path,
  83                 .len = strlen(path)
  84         };
  85         struct pathspec paths = {
  86                 .nr = 1,
  87                 .items = &path_items
  88         };
  89         struct walk_tree_context walk_tree_ctx = {
  90                 .match_path = path,
  91                 .matched_sha1 = sha1,
  92         };
  93
  94         if (hex) {
  95                 if (get_sha1_hex(hex, sha1)) {
  96                         cgit_print_error(fmt("Bad hex value: %s", hex));
  97                         return;
  98                 }
  99         } else {
 100                 if (get_sha1(head, sha1)) {
 101                         cgit_print_error(fmt("Bad ref: %s", head));
 102                         return;
 103                 }
 104         }
 105
 106         type = sha1_object_info(sha1, &size);
 107
 108         if ((!hex) && type == OBJ_COMMIT && path) {
 109                 commit = lookup_commit_reference(sha1);
 110                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 111                 type = sha1_object_info(sha1,&size);
 112         }
 113
 114         if (type == OBJ_BAD) {
 115                 cgit_print_error(fmt("Bad object name: %s", hex));
 116                 return;
 117         }
 118
 119         buf = read_sha1_file(sha1, &type, &size);
 120         if (!buf) {
 121                 cgit_print_error(fmt("Error reading object %s", hex));
 122                 return;
 123         }
 124
 125         buf[size] = '\0';
 126         ctx.page.mimetype = ctx.qry.mimetype;
 127         if (!ctx.page.mimetype) {
 128                 if (buffer_is_binary(buf, size))
 129                         ctx.page.mimetype = "application/octet-stream";
 130                 else
 131                         ctx.page.mimetype = "text/plain";
 132         }
 133         ctx.page.filename = path;
 134         cgit_print_http_headers(&ctx);
 135         html_raw(buf, size);
 136 }