Implement plain view

This implements a way to access plain blobs by path (similar to the
tree view) instead of by sha1.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

9 files changed, 106 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 78aad10..a305894 100644
--- a/Makefile
+++ b/Makefile
@@ -52,24 +52,25 @@ OBJECTS += cache.o
 OBJECTS += cgit.o
 OBJECTS += cmd.o
 OBJECTS += configfile.o
 OBJECTS += html.o
 OBJECTS += parsing.o
 OBJECTS += shared.o
 OBJECTS += ui-blob.o
 OBJECTS += ui-clone.o
 OBJECTS += ui-commit.o
 OBJECTS += ui-diff.o
 OBJECTS += ui-log.o
 OBJECTS += ui-patch.o
+OBJECTS += ui-plain.o
 OBJECTS += ui-refs.o
 OBJECTS += ui-repolist.o
 OBJECTS += ui-shared.o
 OBJECTS += ui-snapshot.o
 OBJECTS += ui-summary.o
 OBJECTS += ui-tag.o
 OBJECTS += ui-tree.o
 
 ifdef NEEDS_LIBICONV
         EXTLIBS += -liconv
 endif
 
diff --git a/cgit.c b/cgit.c
index f49fffa..497337b 100644
--- a/cgit.c
+++ b/cgit.c
@@ -178,24 +178,25 @@ static void prepare_context(struct cgit_context *ctx)
         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
         ctx->cfg.renamelimit = -1;
         ctx->cfg.robots = "index, nofollow";
         ctx->cfg.root_title = "Git repository browser";
         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
         ctx->cfg.summary_branches = 10;
         ctx->cfg.summary_log = 10;
         ctx->cfg.summary_tags = 10;
         ctx->page.mimetype = "text/html";
         ctx->page.charset = PAGE_ENCODING;
         ctx->page.filename = NULL;
+        ctx->page.size = 0;
         ctx->page.modified = time(NULL);
         ctx->page.expires = ctx->page.modified;
 }
 
 struct refmatch {
         char *req_ref;
         char *first_ref;
         int match;
 };
 
 int find_current_ref(const char *refname, const unsigned char *sha1,
                      int flags, void *cb_data)
diff --git a/cgit.h b/cgit.h
index b01fa31..e2af0c2 100644
--- a/cgit.h
+++ b/cgit.h
@@ -156,24 +156,25 @@ struct cgit_config {
         int max_repodesc_len;
         int nocache;
         int renamelimit;
         int snapshots;
         int summary_branches;
         int summary_log;
         int summary_tags;
 };
 
 struct cgit_page {
         time_t modified;
         time_t expires;
+        size_t size;
         char *mimetype;
         char *charset;
         char *filename;
         char *title;
 };
 
 struct cgit_context {
         struct cgit_query qry;
         struct cgit_config cfg;
         struct cgit_repo *repo;
         struct cgit_page page;
 };
diff --git a/cmd.c b/cmd.c
index 03e165c..2b34189 100644
--- a/cmd.c
+++ b/cmd.c
@@ -7,24 +7,25 @@
  */
 
 #include "cgit.h"
 #include "cmd.h"
 #include "cache.h"
 #include "ui-shared.h"
 #include "ui-blob.h"
 #include "ui-clone.h"
 #include "ui-commit.h"
 #include "ui-diff.h"
 #include "ui-log.h"
 #include "ui-patch.h"
+#include "ui-plain.h"
 #include "ui-refs.h"
 #include "ui-repolist.h"
 #include "ui-snapshot.h"
 #include "ui-summary.h"
 #include "ui-tag.h"
 #include "ui-tree.h"
 
 static void HEAD_fn(struct cgit_context *ctx)
 {
         cgit_clone_head(ctx);
 }
 
@@ -76,24 +77,29 @@ static void objects_fn(struct cgit_context *ctx)
 }
 
 static void repolist_fn(struct cgit_context *ctx)
 {
         cgit_print_repolist();
 }
 
 static void patch_fn(struct cgit_context *ctx)
 {
         cgit_print_patch(ctx->qry.sha1);
 }
 
+static void plain_fn(struct cgit_context *ctx)
+{
+        cgit_print_plain(ctx);
+}
+
 static void refs_fn(struct cgit_context *ctx)
 {
         cgit_print_refs();
 }
 
 static void snapshot_fn(struct cgit_context *ctx)
 {
         cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1,
                             cgit_repobasename(ctx->repo->url), ctx->qry.path,
                             ctx->repo->snapshots);
 }
 
@@ -119,24 +125,25 @@ struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx)
 {
         static struct cgit_cmd cmds[] = {
                 def_cmd(HEAD, 1, 0),
                 def_cmd(about, 0, 1),
                 def_cmd(blob, 1, 0),
                 def_cmd(commit, 1, 1),
                 def_cmd(diff, 1, 1),
                 def_cmd(info, 1, 0),
                 def_cmd(log, 1, 1),
                 def_cmd(ls_cache, 0, 0),
                 def_cmd(objects, 1, 0),
                 def_cmd(patch, 1, 0),
+                def_cmd(plain, 1, 0),
                 def_cmd(refs, 1, 1),
                 def_cmd(repolist, 0, 0),
                 def_cmd(snapshot, 1, 0),
                 def_cmd(summary, 1, 1),
                 def_cmd(tag, 1, 1),
                 def_cmd(tree, 1, 1),
         };
         int i;
 
         if (ctx->qry.page == NULL) {
                 if (ctx->repo)
                         ctx->qry.page = "summary";
diff --git a/html.c b/html.c
index 1237076..83fc7a9 100644
--- a/html.c
+++ b/html.c
@@ -26,24 +26,29 @@ char *fmt(const char *format, ...)
         bufidx &= 7;
 
         va_start(args, format);
         len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
         va_end(args);
         if (len>sizeof(buf[bufidx])) {
                 fprintf(stderr, "[html.c] string truncated: %s\n", format);
                 exit(1);
         }
         return buf[bufidx];
 }
 
+void html_raw(const char *data, size_t size)
+{
+        write(htmlfd, data, size);
+}
+
 void html(const char *txt)
 {
         write(htmlfd, txt, strlen(txt));
 }
 
 void htmlf(const char *format, ...)
 {
         static char buf[65536];
         va_list args;
 
         va_start(args, format);
         vsnprintf(buf, sizeof(buf), format, args);
diff --git a/html.h b/html.h
index 2bde28d..49462a2 100644
--- a/html.h
+++ b/html.h
@@ -1,17 +1,18 @@
 #ifndef HTML_H
 #define HTML_H
 
 extern int htmlfd;
 
+extern void html_raw(const char *txt, size_t size);
 extern void html(const char *txt);
 extern void htmlf(const char *format,...);
 extern void html_status(int code, int more_headers);
 extern void html_txt(char *txt);
 extern void html_ntxt(int len, char *txt);
 extern void html_attr(char *txt);
 extern void html_hidden(char *name, char *value);
 extern void html_option(char *value, char *text, char *selected_value);
 extern void html_link_open(char *url, char *title, char *class);
 extern void html_link_close(void);
 extern void html_fileperm(unsigned short mode);
 extern int html_include(const char *filename);
diff --git a/ui-plain.c b/ui-plain.c
new file mode 100644
index 0000000..28deae5
--- a/dev/null
+++ b/ui-plain.c
@@ -0,0 +1,82 @@
+/* ui-plain.c: functions for output of plain blobs by path
+ *
+ * Copyright (C) 2008 Lars Hjemli
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+
+#include "cgit.h"
+#include "html.h"
+#include "ui-shared.h"
+
+char *curr_rev;
+char *match_path;
+int match;
+
+static void print_object(const unsigned char *sha1, const char *path)
+{
+        enum object_type type;
+        char *buf;
+        size_t size;
+
+        type = sha1_object_info(sha1, &size);
+        if (type == OBJ_BAD) {
+                html_status(404, 0);
+                return;
+        }
+
+        buf = read_sha1_file(sha1, &type, &size);
+        if (!buf) {
+                html_status(404, 0);
+                return;
+        }
+        ctx.page.mimetype = "text/plain";
+        ctx.page.filename = fmt("%s", path);
+        ctx.page.size = size;
+        cgit_print_http_headers(&ctx);
+        html_raw(buf, size);
+        match = 1;
+}
+
+static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
+                     const char *pathname, unsigned mode, int stage,
+                     void *cbdata)
+{
+        fprintf(stderr, "[cgit] walk_tree.pathname=%s", pathname);
+
+        if (!pathname || strcmp(match_path, pathname))
+                return READ_TREE_RECURSIVE;
+
+        if (S_ISREG(mode))
+                print_object(sha1, pathname);
+
+        return 0;
+}
+
+void cgit_print_plain(struct cgit_context *ctx)
+{
+        const char *rev = ctx->qry.sha1;
+        unsigned char sha1[20];
+        struct commit *commit;
+        const char *paths[] = {ctx->qry.path, NULL};
+
+        if (!rev)
+                rev = ctx->qry.head;
+
+        curr_rev = xstrdup(rev);
+        if (get_sha1(rev, sha1)) {
+                html_status(404, 0);
+                return;
+        }
+        commit = lookup_commit_reference(sha1);
+        if (!commit || parse_commit(commit)) {
+                html_status(404, 0);
+                return;
+        }
+        match_path = ctx->qry.path;
+        fprintf(stderr, "[cgit] match_path=%s", match_path);
+        read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
+        if (!match)
+                html_status(404, 0);
+}
diff --git a/ui-plain.h b/ui-plain.h
new file mode 100644
index 0000000..4373118
--- a/dev/null
+++ b/ui-plain.h
@@ -0,0 +1,6 @@
+#ifndef UI_PLAIN_H
+#define UI_PLAIN_H
+
+extern void cgit_print_plain(struct cgit_context *ctx);
+
+#endif /* UI_PLAIN_H */
diff --git a/ui-shared.c b/ui-shared.c
index 197ee37..4408969 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -409,24 +409,26 @@ void cgit_print_age(time_t t, time_t max_relative, char *format)
         }
         htmlf("<span class='age-years'>%.0f years</span>",
               secs * 1.0 / TM_YEAR);
 }
 
 void cgit_print_http_headers(struct cgit_context *ctx)
 {
         if (ctx->page.mimetype && ctx->page.charset)
                 htmlf("Content-Type: %s; charset=%s\n", ctx->page.mimetype,
                       ctx->page.charset);
         else if (ctx->page.mimetype)
                 htmlf("Content-Type: %s\n", ctx->page.mimetype);
+        if (ctx->page.size)
+                htmlf("Content-Length: %ld\n", ctx->page.size);
         if (ctx->page.filename)
                 htmlf("Content-Disposition: inline; filename=\"%s\"\n",
                       ctx->page.filename);
         htmlf("Last-Modified: %s\n", http_date(ctx->page.modified));
         htmlf("Expires: %s\n", http_date(ctx->page.expires));
         html("\n");
 }
 
 void cgit_print_docstart(struct cgit_context *ctx)
 {
         html(cgit_doctype);
         html("<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>\n");