ui-blob.c

   1 /* ui-blob.c: show blob content
   2  *
   3  * Copyright (C) 2008 Lars Hjemli
   4  * Copyright (C) 2010-2013 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         const char *match_path;
  17         unsigned char *matched_sha1;
  18         int found_path:1;
  19         int file_only:1;
  20 };
  21
  22 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
  23         const char *pathname, unsigned mode, int stage, void *cbdata)
  24 {
  25         struct walk_tree_context *walk_tree_ctx = cbdata;
  26
  27         if (walk_tree_ctx->file_only && !S_ISREG(mode))
  28                 return READ_TREE_RECURSIVE;
  29         if (strncmp(base, walk_tree_ctx->match_path, baselen)
  30                 || strcmp(walk_tree_ctx->match_path + baselen, pathname))
  31                 return READ_TREE_RECURSIVE;
  32         memmove(walk_tree_ctx->matched_sha1, sha1, 20);
  33         walk_tree_ctx->found_path = 1;
  34         return 0;
  35 }
  36
  37 int cgit_ref_path_exists(const char *path, const char *ref, int file_only)
  38 {
  39         unsigned char sha1[20];
  40         unsigned long size;
  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                 .file_only = file_only
  54         };
  55
  56         if (get_sha1(ref, sha1))
  57                 return 0;
  58         if (sha1_object_info(sha1, &size) != OBJ_COMMIT)
  59                 return 0;
  60         read_tree_recursive(lookup_commit_reference(sha1)->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  61         return walk_tree_ctx.found_path;
  62 }
  63
  64 int cgit_print_file(char *path, const char *head, int file_only)
  65 {
  66         unsigned char sha1[20];
  67         enum object_type type;
  68         char *buf;
  69         unsigned long size;
  70         struct commit *commit;
  71         struct pathspec_item path_items = {
  72                 .match = path,
  73                 .len = strlen(path)
  74         };
  75         struct pathspec paths = {
  76                 .nr = 1,
  77                 .items = &path_items
  78         };
  79         struct walk_tree_context walk_tree_ctx = {
  80                 .match_path = path,
  81                 .matched_sha1 = sha1,
  82                 .found_path = 0,
  83                 .file_only = file_only
  84         };
  85
  86         if (get_sha1(head, sha1))
  87                 return -1;
  88         type = sha1_object_info(sha1, &size);
  89         if (type == OBJ_COMMIT && path) {
  90                 commit = lookup_commit_reference(sha1);
  91                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  92                 if (!walk_tree_ctx.found_path)
  93                         return -1;
  94                 type = sha1_object_info(sha1, &size);
  95         }
  96         if (type == OBJ_BAD)
  97                 return -1;
  98         buf = read_sha1_file(sha1, &type, &size);
  99         if (!buf)
 100                 return -1;
 101         buf[size] = '\0';
 102         html_raw(buf, size);
 103         return 0;
 104 }
 105
 106 void cgit_print_blob(const char *hex, char *path, const char *head, int file_only)
 107 {
 108         unsigned char sha1[20];
 109         enum object_type type;
 110         char *buf;
 111         unsigned long size;
 112         struct commit *commit;
 113         struct pathspec_item path_items = {
 114                 .match = path,
 115                 .len = path ? strlen(path) : 0
 116         };
 117         struct pathspec paths = {
 118                 .nr = 1,
 119                 .items = &path_items
 120         };
 121         struct walk_tree_context walk_tree_ctx = {
 122                 .match_path = path,
 123                 .matched_sha1 = sha1,
 124                 .found_path = 0,
 125                 .file_only = file_only
 126         };
 127
 128         if (hex) {
 129                 if (get_sha1_hex(hex, sha1)) {
 130                         cgit_print_error("Bad hex value: %s", hex);
 131                         return;
 132                 }
 133         } else {
 134                 if (get_sha1(head, sha1)) {
 135                         cgit_print_error("Bad ref: %s", head);
 136                         return;
 137                 }
 138         }
 139
 140         type = sha1_object_info(sha1, &size);
 141
 142         if ((!hex) && type == OBJ_COMMIT && path) {
 143                 commit = lookup_commit_reference(sha1);
 144                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 145                 type = sha1_object_info(sha1,&size);
 146         }
 147
 148         if (type == OBJ_BAD) {
 149                 cgit_print_error("Bad object name: %s", hex);
 150                 return;
 151         }
 152
 153         buf = read_sha1_file(sha1, &type, &size);
 154         if (!buf) {
 155                 cgit_print_error("Error reading object %s", hex);
 156                 return;
 157         }
 158
 159         buf[size] = '\0';
 160         ctx.page.mimetype = ctx.qry.mimetype;
 161         if (!ctx.page.mimetype) {
 162                 if (buffer_is_binary(buf, size))
 163                         ctx.page.mimetype = "application/octet-stream";
 164                 else
 165                         ctx.page.mimetype = "text/plain";
 166         }
 167         ctx.page.filename = path;
 168         cgit_print_http_headers(&ctx);
 169         html_raw(buf, size);
 170 }