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/* ui-clone.c: functions for http cloning, based on
 * git's http-backend.c by Shawn O. Pearce
 *
 * 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"

static int print_ref_info(const char *refname, const unsigned char *sha1,
                          int flags, void *cb_data)
{
	struct object *obj;

	if (!(obj = parse_object(sha1)))
		return 0;

	if (!strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"))
		htmlf("%s\t%s\n", sha1_to_hex(sha1), refname);
	else if (!prefixcmp(refname, "refs/tags") && obj->type == OBJ_TAG) {
		if (!(obj = deref_tag(obj, refname, 0)))
			return 0;
		htmlf("%s\t%s\n", sha1_to_hex(sha1), refname);
		htmlf("%s\t%s^{}\n", sha1_to_hex(obj->sha1), refname);
	}
	return 0;
}

static void print_pack_info(struct cgit_context *ctx)
{
	struct packed_git *pack;
	int ofs;

	ctx->page.mimetype = "text/plain";
	ctx->page.filename = "objects/info/packs";
	cgit_print_http_headers(ctx);
	ofs = strlen(ctx->repo->path) + strlen("/objects/pack/");
	prepare_packed_git();
	for (pack = packed_git; pack; pack = pack->next)
		if (pack->pack_local)
			htmlf("P %s\n", pack->pack_name + ofs);
}

static void send_file(struct cgit_context *ctx, char *path)
{
	struct stat st;

	if (stat(path, &st)) {
		switch (errno) {
		case ENOENT:
			html_status(404, "Not found", 0);
			break;
		case EACCES:
			html_status(403, "Forbidden", 0);
			break;
		default:
			html_status(400, "Bad request", 0);
		}
		return;
	}
	ctx->page.mimetype = "application/octet-stream";
	ctx->page.filename = path;
	if (prefixcmp(ctx->repo->path, path))
		ctx->page.filename += strlen(ctx->repo->path) + 1;
	cgit_print_http_headers(ctx);
	html_include(path);
}

void cgit_clone_info(struct cgit_context *ctx)
{
	if (!ctx->qry.path || strcmp(ctx->qry.path, "refs"))
		return;

	ctx->page.mimetype = "text/plain";
	ctx->page.filename = "info/refs";
	cgit_print_http_headers(ctx);
	for_each_ref(print_ref_info, ctx);
}

void cgit_clone_objects(struct cgit_context *ctx)
{
	if (!ctx->qry.path) {
		html_status(400, "Bad request", 0);
		return;
	}

	if (!strcmp(ctx->qry.path, "info/packs")) {
		print_pack_info(ctx);
		return;
	}

	send_file(ctx, git_path("objects/%s", ctx->qry.path));
}

void cgit_clone_head(struct cgit_context *ctx)
{
	send_file(ctx, git_path("%s", "HEAD"));
}
lass="p">, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "%7b", "%7c", "%7d", NULL, "%7f", "%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87", "%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f", "%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97", "%98", "%99", "%9a", "%9b", "%9c", "%9d", "%9e", "%9f", "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7", "%a8", "%a9", "%aa", "%ab", "%ac", "%ad", "%ae", "%af", "%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7", "%b8", "%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf", "%c0", "%c1", "%c2", "%c3", "%c4", "%c5", "%c6", "%c7", "%c8", "%c9", "%ca", "%cb", "%cc", "%cd", "%ce", "%cf", "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", "%d8", "%d9", "%da", "%db", "%dc", "%dd", "%de", "%df", "%e0", "%e1", "%e2", "%e3", "%e4", "%e5", "%e6", "%e7", "%e8", "%e9", "%ea", "%eb", "%ec", "%ed", "%ee", "%ef", "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7", "%f8", "%f9", "%fa", "%fb", "%fc", "%fd", "%fe", "%ff" }; char *fmt(const char *format, ...) { static char buf[8][1024]; static int bufidx; int len; va_list args; bufidx++; 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]; } char *fmtalloc(const char *format, ...) { struct strbuf sb = STRBUF_INIT; va_list args; va_start(args, format); strbuf_vaddf(&sb, format, args); va_end(args); return strbuf_detach(&sb, NULL); } void html_raw(const char *data, size_t size) { if (write(STDOUT_FILENO, data, size) != size) die_errno("write error on html output"); } void html(const char *txt) { html_raw(txt, strlen(txt)); } void htmlf(const char *format, ...) { va_list args; struct strbuf buf = STRBUF_INIT; va_start(args, format); strbuf_vaddf(&buf, format, args); va_end(args); html(buf.buf); strbuf_release(&buf); } void html_txtf(const char *format, ...) { va_list args; va_start(args, format); html_vtxtf(format, args); va_end(args); } void html_vtxtf(const char *format, va_list ap) { va_list cp; struct strbuf buf = STRBUF_INIT; va_copy(cp, ap); strbuf_vaddf(&buf, format, cp); va_end(cp); html_txt(buf.buf); strbuf_release(&buf); } void html_status(int code, const char *msg, int more_headers) { htmlf("Status: %d %s\n", code, msg); if (!more_headers) html("\n"); } void html_txt(const char *txt) { const char *t = txt; while (t && *t) { int c = *t; if (c == '<' || c == '>' || c == '&') { html_raw(txt, t - txt); if (c == '>') html("&gt;"); else if (c == '<') html("&lt;"); else if (c == '&') html("&amp;"); txt = t + 1; } t++; } if (t != txt) html(txt); } void html_ntxt(int len, const char *txt) { const char *t = txt; while (t && *t && len--) { int c = *t; if (c == '<' || c == '>' || c == '&') { html_raw(txt, t - txt); if (c == '>') html("&gt;"); else if (c == '<') html("&lt;"); else if (c == '&') html("&amp;"); txt = t + 1; } t++; } if (t != txt) html_raw(txt, t - txt); if (len < 0) html("..."); } void html_attrf(const char *fmt, ...) { va_list ap; struct strbuf sb = STRBUF_INIT; va_start(ap, fmt); strbuf_vaddf(&sb, fmt, ap); va_end(ap); html_attr(sb.buf); strbuf_release(&sb); } void html_attr(const char *txt) { const char *t = txt; while (t && *t) { int c = *t; if (c == '<' || c == '>' || c == '\'' || c == '\"' || c == '&') { html_raw(txt, t - txt); if (c == '>') html("&gt;"); else if (c == '<') html("&lt;"); else if (c == '\'') html("&#x27;"); else if (c == '"') html("&quot;"); else if (c == '&') html("&amp;"); txt = t + 1; } t++; } if (t != txt) html(txt); } void html_url_path(const char *txt) { const char *t = txt; while (t && *t) { unsigned char c = *t; const char *e = url_escape_table[c]; if (e && c != '+' && c != '&') { html_raw(txt, t - txt); html(e); txt = t + 1; } t++; } if (t != txt) html(txt); } void html_url_arg(const char *txt) { const char *t = txt; while (t && *t) { unsigned char c = *t; const char *e = url_escape_table[c]; if (c == ' ') e = "+"; if (e) { html_raw(txt, t - txt); html(e); txt = t + 1; } t++; } if (t != txt) html(txt); } void html_hidden(const char *name, const char *value) { html("<input type='hidden' name='"); html_attr(name); html("' value='"); html_attr(value); html("'/>"); } void html_option(const char *value, const char *text, const char *selected_value) { html("<option value='"); html_attr(value); html("'"); if (selected_value && !strcmp(selected_value, value)) html(" selected='selected'"); html(">"); html_txt(text); html("</option>\n"); } void html_intoption(int value, const char *text, int selected_value) { htmlf("<option value='%d'%s>", value, value == selected_value ? " selected='selected'" : ""); html_txt(text); html("</option>"); } void html_link_open(const char *url, const char *title, const char *class) { html("<a href='"); html_attr(url); if (title) { html("' title='"); html_attr(title); } if (class) { html("' class='"); html_attr(class); } html("'>"); } void html_link_close(void) { html("</a>"); } void html_fileperm(unsigned short mode) { htmlf("%c%c%c", (mode & 4 ? 'r' : '-'), (mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-')); } int html_include(const char *filename) { FILE *f; char buf[4096]; size_t len; if (!(f = fopen(filename, "r"))) { fprintf(stderr, "[cgit] Failed to include file %s: %s (%d).\n", filename, strerror(errno), errno); return -1; } while ((len = fread(buf, 1, 4096, f)) > 0) html_raw(buf, len); fclose(f); return 0; } static int hextoint(char c) { if (c >= 'a' && c <= 'f') return 10 + c - 'a'; else if (c >= 'A' && c <= 'F') return 10 + c - 'A'; else if (c >= '0' && c <= '9') return c - '0'; else return -1; } static char *convert_query_hexchar(char *txt) { int d1, d2, n; n = strlen(txt); if (n < 3) { *txt = '\0'; return txt-1; } d1 = hextoint(*(txt + 1)); d2 = hextoint(*(txt + 2)); if (d1 < 0 || d2 < 0) { memmove(txt, txt + 3, n - 2); return txt-1; } else { *txt = d1 * 16 + d2; memmove(txt + 1, txt + 3, n - 2); return txt; } } int http_parse_querystring(const char *txt_, void (*fn)(const char *name, const char *value)) { char *o, *t, *txt, *value = NULL, c; if (!txt_) return 0; o = t = txt = xstrdup(txt_); while ((c=*t) != '\0') { if (c == '=') { *t = '\0'; value = t + 1; } else if (c == '+') { *t = ' '; } else if (c == '%') { t = convert_query_hexchar(t); } else if (c == '&') { *t = '\0'; (*fn)(txt, value); txt = t + 1; value = NULL; } t++; } if (t != txt) (*fn)(txt, value); free(o); return 0; }