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 "ui-blob.h"
  12 #include "html.h"
  13 #include "ui-shared.h"
  14
  15 struct walk_tree_context {
  16         char *match_path;
  17         unsigned char *matched_sha1;
  18         int found_path;
  19 };
  20
  21 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
  22         const char *pathname, unsigned mode, int stage, void *cbdata)
  23 {
  24         struct walk_tree_context *walk_tree_ctx = cbdata;
  25
  26         if (strncmp(base, walk_tree_ctx->match_path, baselen)
  27                 || strcmp(walk_tree_ctx->match_path + baselen, pathname))
  28                 return READ_TREE_RECURSIVE;
  29         memmove(walk_tree_ctx->matched_sha1, sha1, 20);
  30         walk_tree_ctx->found_path = 1;
  31         return 0;
  32 }
  33
  34 int cgit_print_file(char *path, const char *head)
  35 {
  36         unsigned char sha1[20];
  37         enum object_type type;
  38         char *buf;
  39         unsigned long size;
  40         struct commit *commit;
  41         struct pathspec_item path_items = {
  42                 .match = path,
  43                 .len = strlen(path)
  44         };
  45         struct pathspec paths = {
  46                 .nr = 1,
  47                 .items = &path_items
  48         };
  49         struct walk_tree_context walk_tree_ctx = {
  50                 .match_path = path,
  51                 .matched_sha1 = sha1,
  52                 .found_path = 0
  53         };
  54
  55         if (get_sha1(head, sha1))
  56                 return -1;
  57         type = sha1_object_info(sha1, &size);
  58         if (type == OBJ_COMMIT && path) {
  59                 commit = lookup_commit_reference(sha1);
  60                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  61                 if (!walk_tree_ctx.found_path)
  62                         return -1;
  63                 type = sha1_object_info(sha1, &size);
  64         }
  65         if (type == OBJ_BAD)
  66                 return -1;
  67         buf = read_sha1_file(sha1, &type, &size);
  68         if (!buf)
  69                 return -1;
  70         buf[size] = '\0';
  71         html_raw(buf, size);
  72         return 0;
  73 }
  74
  75 void cgit_print_blob(const char *hex, char *path, const char *head)
  76 {
  77         unsigned char sha1[20];
  78         enum object_type type;
  79         char *buf;
  80         unsigned long size;
  81         struct commit *commit;
  82         struct pathspec_item path_items = {
  83                 .match = path,
  84                 .len = path ? strlen(path) : 0
  85         };
  86         struct pathspec paths = {
  87                 .nr = 1,
  88                 .items = &path_items
  89         };
  90         struct walk_tree_context walk_tree_ctx = {
  91                 .match_path = path,
  92                 .matched_sha1 = sha1,
  93         };
  94
  95         if (hex) {
  96                 if (get_sha1_hex(hex, sha1)) {
  97                         cgit_print_error("Bad hex value: %s", hex);
  98                         return;
  99                 }
 100         } else {
 101                 if (get_sha1(head, sha1)) {
 102                         cgit_print_error("Bad ref: %s", head);
 103                         return;
 104                 }
 105         }
 106
 107         type = sha1_object_info(sha1, &size);
 108
 109         if ((!hex) && type == OBJ_COMMIT && path) {
 110                 commit = lookup_commit_reference(sha1);
 111                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 112                 type = sha1_object_info(sha1,&size);
 113         }
 114
 115         if (type == OBJ_BAD) {
 116                 cgit_print_error("Bad object name: %s", hex);
 117                 return;
 118         }
 119
 120         buf = read_sha1_file(sha1, &type, &size);
 121         if (!buf) {
 122                 cgit_print_error("Error reading object %s", hex);
 123                 return;
 124         }
 125
 126         buf[size] = '\0';
 127         ctx.page.mimetype = ctx.qry.mimetype;
 128         if (!ctx.page.mimetype) {
 129                 if (buffer_is_binary(buf, size))
 130                         ctx.page.mimetype = "application/octet-stream";
 131                 else
 132                         ctx.page.mimetype = "text/plain";
 133         }
 134         ctx.page.filename = path;
 135         cgit_print_http_headers(&ctx);
 136         html_raw(buf, size);
 137 }