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189 lines
5.5 KiB
189 lines
5.5 KiB
/*
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* Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
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*
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* This file is part of NetSurf.
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* content generator for the about scheme imagecache page
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*/
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#include <stdbool.h>
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#include <stdio.h>
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#include "netsurf/types.h"
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#include "image/image_cache.h"
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#include "private.h"
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#include "imagecache.h"
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/* exported interface documented in about/imagecache.h */
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bool fetch_about_imagecache_handler(struct fetch_about_context *ctx)
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{
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char buffer[2048]; /* output buffer */
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int code = 200;
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int slen;
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unsigned int cent_loop = 0;
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int elen = 0; /* entry length */
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nserror res;
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bool even = false;
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/* content is going to return ok */
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fetch_about_set_http_code(ctx, code);
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/* content type */
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if (fetch_about_send_header(ctx, "Content-Type: text/html"))
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goto fetch_about_imagecache_handler_aborted;
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/* page head */
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res = fetch_about_ssenddataf(ctx,
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"<html>\n<head>\n"
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"<title>Image Cache Status</title>\n"
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"<link rel=\"stylesheet\" type=\"text/css\" "
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"href=\"resource:internal.css\">\n"
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"</head>\n"
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"<body id =\"cachelist\" class=\"ns-even-bg ns-even-fg ns-border\">\n"
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"<h1 class=\"ns-border\">Image Cache Status</h1>\n");
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if (res != NSERROR_OK) {
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goto fetch_about_imagecache_handler_aborted;
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}
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/* image cache summary */
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slen = image_cache_snsummaryf(buffer, sizeof(buffer),
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"<p>Configured limit of %a hysteresis of %b</p>\n"
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"<p>Total bitmap size in use %c (in %d)</p>\n"
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"<p>Age %es</p>\n"
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"<p>Peak size %f (in %g)</p>\n"
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"<p>Peak image count %h (size %i)</p>\n"
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"<p>Cache total/hit/miss/fail (counts) %j/%k/%l/%m "
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"(%pj%%/%pk%%/%pl%%/%pm%%)"
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"<img width=200 height=100 src=\"about:chart?type=pie&width=200&height=100&labels=hit,miss,fail&values=%k,%l,%m\" />"
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"</p>\n");
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if (slen >= (int) (sizeof(buffer))) {
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goto fetch_about_imagecache_handler_aborted; /* overflow */
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}
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res = fetch_about_senddata(ctx, (const uint8_t *)buffer, slen);
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if (res != NSERROR_OK) {
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goto fetch_about_imagecache_handler_aborted;
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}
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/* image cache summary */
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slen = image_cache_snsummaryf(buffer, sizeof(buffer),
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"<p>Cache total/hit/miss/fail (size) %n/%o/%q/%r "
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"(%pn%%/%po%%/%pq%%/%pr%%)"
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"<img width=200 height=100 src=\"about:chart?type=pie&width=200&height=100&labels=hit,miss,fail&values=%o,%q,%r\" /></p>\n"
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"<p>Total images never rendered: %s "
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"(includes %t that were converted)</p>\n"
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"<p>Total number of excessive conversions: %u "
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"(from %v images converted more than once)"
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"</p>\n"
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"<p>Bitmap of size %w had most (%x) conversions</p>\n"
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"<h2 class=\"ns-border\">Current contents</h2>\n");
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if (slen >= (int) (sizeof(buffer))) {
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goto fetch_about_imagecache_handler_aborted; /* overflow */
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}
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res = fetch_about_senddata(ctx, (const uint8_t *)buffer, slen);
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if (res != NSERROR_OK) {
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goto fetch_about_imagecache_handler_aborted;
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}
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/* image cache entry table */
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res = fetch_about_ssenddataf(ctx, "<p class=\"imagecachelist\">\n"
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"<strong>"
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"<span>Entry</span>"
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"<span>Content Key</span>"
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"<span>Redraw Count</span>"
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"<span>Conversion Count</span>"
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"<span>Last Redraw</span>"
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"<span>Bitmap Age</span>"
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"<span>Bitmap Size</span>"
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"<span>Source</span>"
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"</strong>\n");
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if (res != NSERROR_OK) {
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goto fetch_about_imagecache_handler_aborted;
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}
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slen = 0;
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do {
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if (even) {
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elen = image_cache_snentryf(buffer + slen,
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sizeof buffer - slen,
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cent_loop,
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"<a href=\"%U\">"
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"<span class=\"ns-border\">%e</span>"
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"<span class=\"ns-border\">%k</span>"
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"<span class=\"ns-border\">%r</span>"
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"<span class=\"ns-border\">%c</span>"
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"<span class=\"ns-border\">%a</span>"
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"<span class=\"ns-border\">%g</span>"
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"<span class=\"ns-border\">%s</span>"
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"<span class=\"ns-border\">%o</span>"
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"</a>\n");
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} else {
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elen = image_cache_snentryf(buffer + slen,
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sizeof buffer - slen,
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cent_loop,
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"<a class=\"ns-odd-bg\" href=\"%U\">"
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"<span class=\"ns-border\">%e</span>"
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"<span class=\"ns-border\">%k</span>"
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"<span class=\"ns-border\">%r</span>"
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"<span class=\"ns-border\">%c</span>"
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"<span class=\"ns-border\">%a</span>"
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"<span class=\"ns-border\">%g</span>"
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"<span class=\"ns-border\">%s</span>"
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"<span class=\"ns-border\">%o</span>"
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"</a>\n");
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}
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if (elen <= 0)
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break; /* last option */
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if (elen >= (int) (sizeof buffer - slen)) {
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/* last entry would not fit in buffer, submit buffer */
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res = fetch_about_senddata(ctx,
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(const uint8_t *)buffer,
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slen);
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if (res != NSERROR_OK) {
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goto fetch_about_imagecache_handler_aborted;
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}
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slen = 0;
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} else {
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/* normal addition */
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slen += elen;
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cent_loop++;
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even = !even;
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}
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} while (elen > 0);
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slen += snprintf(buffer + slen, sizeof buffer - slen,
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"</p>\n</body>\n</html>\n");
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res = fetch_about_senddata(ctx, (const uint8_t *)buffer, slen);
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if (res != NSERROR_OK) {
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goto fetch_about_imagecache_handler_aborted;
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}
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fetch_about_send_finished(ctx);
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return true;
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fetch_about_imagecache_handler_aborted:
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return false;
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}
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