https://github.com/brcontainer/html2canvas-php-proxy
PHP Proxy html2canvas
https://github.com/brcontainer/html2canvas-php-proxy
html2canvas html2canvas-proxy php proxy-server
Last synced: 11 months ago
JSON representation
PHP Proxy html2canvas
- Host: GitHub
- URL: https://github.com/brcontainer/html2canvas-php-proxy
- Owner: brcontainer
- License: mit
- Created: 2013-08-04T17:15:59.000Z (over 12 years ago)
- Default Branch: master
- Last Pushed: 2021-04-22T20:39:29.000Z (almost 5 years ago)
- Last Synced: 2024-10-13T12:07:33.631Z (over 1 year ago)
- Topics: html2canvas, html2canvas-proxy, php, proxy-server
- Language: PHP
- Homepage:
- Size: 216 KB
- Stars: 134
- Watchers: 18
- Forks: 77
- Open Issues: 1
-
Metadata Files:
- Readme: README.html
- Changelog: CHANGELOG.html
- License: LICENSE
Awesome Lists containing this project
README
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max-width: 980px;
border: 1px solid #ddd;
outline: 1300px solid #fff;
margin: 16px auto;
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font-family: fontawesome-mini;
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background-image: linear-gradient(#fefefe, #e7e7e7);
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vertical-align: middle;
margin-left: -16px;
float: left;
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opacity: 0;
color: #333;
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margin-top: 0.6rem;
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.markdown-body pre,
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margin-bottom: 16px;
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padding: 0;
margin: 16px 0;
background-color: #e7e7e7;
border: 0 none;
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padding-left: 2em;
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.markdown-body ol ol,
.markdown-body ol ul {
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margin-bottom: 0;
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margin-top: 16px;
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font-style: italic;
font-weight: bold;
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margin-bottom: 16px;
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color: #777;
border-left: 4px solid #ddd;
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margin-top: 0;
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overflow: auto;
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word-break: keep-all;
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border: 1px solid #ddd;
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border-top: 1px solid #ccc;
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padding-top: 0.2em;
padding-bottom: 0.2em;
margin: 0;
font-size: 85%;
background-color: rgba(0,0,0,0.04);
border-radius: 3px;
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.markdown-body code:before,
.markdown-body code:after {
letter-spacing: -0.2em;
content: "\00a0";
}
.markdown-body pre>code {
padding: 0;
margin: 0;
font-size: 100%;
word-break: normal;
white-space: pre;
background: transparent;
border: 0;
}
.markdown-body .codehilite {
margin-bottom: 16px;
}
.markdown-body .codehilite pre,
.markdown-body pre {
padding: 16px;
overflow: auto;
font-size: 85%;
line-height: 1.45;
background-color: #f7f7f7;
border-radius: 3px;
}
.markdown-body .codehilite pre {
margin-bottom: 0;
word-break: normal;
}
.markdown-body pre {
word-wrap: normal;
}
.markdown-body pre code {
display: inline;
max-width: initial;
padding: 0;
margin: 0;
overflow: initial;
line-height: inherit;
word-wrap: normal;
background-color: transparent;
border: 0;
}
.markdown-body pre code:before,
.markdown-body pre code:after {
content: normal;
}
/* Admonition */
.markdown-body .admonition {
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
position: relative;
border-radius: 3px;
border: 1px solid #e0e0e0;
border-left: 6px solid #333;
padding: 10px 10px 10px 30px;
}
.markdown-body .admonition table {
color: #333;
}
.markdown-body .admonition p {
padding: 0;
}
.markdown-body .admonition-title {
font-weight: bold;
margin: 0;
}
.markdown-body .admonition>.admonition-title {
color: #333;
}
.markdown-body .attention>.admonition-title {
color: #a6d796;
}
.markdown-body .caution>.admonition-title {
color: #d7a796;
}
.markdown-body .hint>.admonition-title {
color: #96c6d7;
}
.markdown-body .danger>.admonition-title {
color: #c25f77;
}
.markdown-body .question>.admonition-title {
color: #96a6d7;
}
.markdown-body .note>.admonition-title {
color: #d7c896;
}
.markdown-body .admonition:before,
.markdown-body .attention:before,
.markdown-body .caution:before,
.markdown-body .hint:before,
.markdown-body .danger:before,
.markdown-body .question:before,
.markdown-body .note:before {
font: normal normal 16px fontawesome-mini;
-moz-osx-font-smoothing: grayscale;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
line-height: 1.5;
color: #333;
position: absolute;
left: 0;
top: 0;
padding-top: 10px;
padding-left: 10px;
}
.markdown-body .admonition:before {
content: "\f056\00a0";
color: 333;
}
.markdown-body .attention:before {
content: "\f058\00a0";
color: #a6d796;
}
.markdown-body .caution:before {
content: "\f06a\00a0";
color: #d7a796;
}
.markdown-body .hint:before {
content: "\f05a\00a0";
color: #96c6d7;
}
.markdown-body .danger:before {
content: "\f057\00a0";
color: #c25f77;
}
.markdown-body .question:before {
content: "\f059\00a0";
color: #96a6d7;
}
.markdown-body .note:before {
content: "\f040\00a0";
color: #d7c896;
}
.markdown-body .admonition::after {
content: normal;
}
.markdown-body .attention {
border-left: 6px solid #a6d796;
}
.markdown-body .caution {
border-left: 6px solid #d7a796;
}
.markdown-body .hint {
border-left: 6px solid #96c6d7;
}
.markdown-body .danger {
border-left: 6px solid #c25f77;
}
.markdown-body .question {
border-left: 6px solid #96a6d7;
}
.markdown-body .note {
border-left: 6px solid #d7c896;
}
.markdown-body .admonition>*:first-child {
margin-top: 0 !important;
}
.markdown-body .admonition>*:last-child {
margin-bottom: 0 !important;
}
/* progress bar*/
.markdown-body .progress {
display: block;
width: 300px;
margin: 10px 0;
height: 24px;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
background-color: #ededed;
position: relative;
box-shadow: inset -1px 1px 3px rgba(0, 0, 0, .1);
}
.markdown-body .progress-label {
position: absolute;
text-align: center;
font-weight: bold;
width: 100%; margin: 0;
line-height: 24px;
color: #333;
text-shadow: 1px 1px 0 #fefefe, -1px -1px 0 #fefefe, -1px 1px 0 #fefefe, 1px -1px 0 #fefefe, 0 1px 0 #fefefe, 0 -1px 0 #fefefe, 1px 0 0 #fefefe, -1px 0 0 #fefefe, 1px 1px 2px #000;
-webkit-font-smoothing: antialiased !important;
white-space: nowrap;
overflow: hidden;
}
.markdown-body .progress-bar {
height: 24px;
float: left;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
background-color: #96c6d7;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), inset 0 -1px 0 rgba(0, 0, 0, .1);
background-size: 30px 30px;
background-image: -webkit-linear-gradient(
135deg, rgba(255, 255, 255, .4) 27%,
transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%,
transparent 77%, transparent
);
background-image: -moz-linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
background-image: -ms-linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
background-image: -o-linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
background-image: linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
}
.markdown-body .progress-100plus .progress-bar {
background-color: #a6d796;
}
.markdown-body .progress-80plus .progress-bar {
background-color: #c6d796;
}
.markdown-body .progress-60plus .progress-bar {
background-color: #d7c896;
}
.markdown-body .progress-40plus .progress-bar {
background-color: #d7a796;
}
.markdown-body .progress-20plus .progress-bar {
background-color: #d796a6;
}
.markdown-body .progress-0plus .progress-bar {
background-color: #c25f77;
}
.markdown-body .candystripe-animate .progress-bar{
-webkit-animation: animate-stripes 3s linear infinite;
-moz-animation: animate-stripes 3s linear infinite;
animation: animate-stripes 3s linear infinite;
}
@-webkit-keyframes animate-stripes {
0% {
background-position: 0 0;
}
100% {
background-position: 60px 0;
}
}
@-moz-keyframes animate-stripes {
0% {
background-position: 0 0;
}
100% {
background-position: 60px 0;
}
}
@keyframes animate-stripes {
0% {
background-position: 0 0;
}
100% {
background-position: 60px 0;
}
}
.markdown-body .gloss .progress-bar {
box-shadow:
inset 0 4px 12px rgba(255, 255, 255, .7),
inset 0 -12px 0 rgba(0, 0, 0, .05);
}
/* MultiMarkdown Critic Blocks */
.markdown-body .critic_mark {
background: #ff0;
}
.markdown-body .critic_delete {
color: #c82829;
text-decoration: line-through;
}
.markdown-body .critic_insert {
color: #718c00 ;
text-decoration: underline;
}
.markdown-body .critic_comment {
color: #8e908c;
font-style: italic;
}
.markdown-body .headeranchor {
font: normal normal 16px fontawesome-mini;
line-height: 1;
display: inline-block;
text-decoration: none;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
.headeranchor:before {
content: '\e157';
}
.markdown-body .task-list-item {
list-style-type: none;
}
.markdown-body .task-list-item+.task-list-item {
margin-top: 3px;
}
.markdown-body .task-list-item input {
margin: 0 4px 0.25em -20px;
vertical-align: middle;
}
/* Media */
@media only screen and (min-width: 480px) {
.markdown-body {
font-size:14px;
}
}
@media only screen and (min-width: 768px) {
.markdown-body {
font-size:16px;
}
}
@media print {
.markdown-body * {
background: transparent !important;
color: black !important;
filter:none !important;
-ms-filter: none !important;
}
.markdown-body {
font-size:12pt;
max-width:100%;
outline:none;
border: 0;
}
.markdown-body a,
.markdown-body a:visited {
text-decoration: underline;
}
.markdown-body .headeranchor-link {
display: none;
}
.markdown-body a[href]:after {
content: " (" attr(href) ")";
}
.markdown-body abbr[title]:after {
content: " (" attr(title) ")";
}
.markdown-body .ir a:after,
.markdown-body a[href^="javascript:"]:after,
.markdown-body a[href^="#"]:after {
content: "";
}
.markdown-body pre {
white-space: pre;
white-space: pre-wrap;
word-wrap: break-word;
}
.markdown-body pre,
.markdown-body blockquote {
border: 1px solid #999;
padding-right: 1em;
page-break-inside: avoid;
}
.markdown-body .progress,
.markdown-body .progress-bar {
-moz-box-shadow: none;
-webkit-box-shadow: none;
box-shadow: none;
}
.markdown-body .progress {
border: 1px solid #ddd;
}
.markdown-body .progress-bar {
height: 22px;
border-right: 1px solid #ddd;
}
.markdown-body tr,
.markdown-body img {
page-break-inside: avoid;
}
.markdown-body img {
max-width: 100% !important;
}
.markdown-body p,
.markdown-body h2,
.markdown-body h3 {
orphans: 3;
widows: 3;
}
.markdown-body h2,
.markdown-body h3 {
page-break-after: avoid;
}
}
/*GitHub*/
.codehilite {background-color:#fff;color:#333333;}
.codehilite .hll {background-color:#ffffcc;}
.codehilite .c{color:#999988;font-style:italic}
.codehilite .err{color:#a61717;background-color:#e3d2d2}
.codehilite .k{font-weight:bold}
.codehilite .o{font-weight:bold}
.codehilite .cm{color:#999988;font-style:italic}
.codehilite .cp{color:#999999;font-weight:bold}
.codehilite .c1{color:#999988;font-style:italic}
.codehilite .cs{color:#999999;font-weight:bold;font-style:italic}
.codehilite .gd{color:#000000;background-color:#ffdddd}
.codehilite .ge{font-style:italic}
.codehilite .gr{color:#aa0000}
.codehilite .gh{color:#999999}
.codehilite .gi{color:#000000;background-color:#ddffdd}
.codehilite .go{color:#888888}
.codehilite .gp{color:#555555}
.codehilite .gs{font-weight:bold}
.codehilite .gu{color:#800080;font-weight:bold}
.codehilite .gt{color:#aa0000}
.codehilite .kc{font-weight:bold}
.codehilite .kd{font-weight:bold}
.codehilite .kn{font-weight:bold}
.codehilite .kp{font-weight:bold}
.codehilite .kr{font-weight:bold}
.codehilite .kt{color:#445588;font-weight:bold}
.codehilite .m{color:#009999}
.codehilite .s{color:#dd1144}
.codehilite .n{color:#333333}
.codehilite .na{color:teal}
.codehilite .nb{color:#0086b3}
.codehilite .nc{color:#445588;font-weight:bold}
.codehilite .no{color:teal}
.codehilite .ni{color:purple}
.codehilite .ne{color:#990000;font-weight:bold}
.codehilite .nf{color:#990000;font-weight:bold}
.codehilite .nn{color:#555555}
.codehilite .nt{color:navy}
.codehilite .nv{color:teal}
.codehilite .ow{font-weight:bold}
.codehilite .w{color:#bbbbbb}
.codehilite .mf{color:#009999}
.codehilite .mh{color:#009999}
.codehilite .mi{color:#009999}
.codehilite .mo{color:#009999}
.codehilite .sb{color:#dd1144}
.codehilite .sc{color:#dd1144}
.codehilite .sd{color:#dd1144}
.codehilite .s2{color:#dd1144}
.codehilite .se{color:#dd1144}
.codehilite .sh{color:#dd1144}
.codehilite .si{color:#dd1144}
.codehilite .sx{color:#dd1144}
.codehilite .sr{color:#009926}
.codehilite .s1{color:#dd1144}
.codehilite .ss{color:#990073}
.codehilite .bp{color:#999999}
.codehilite .vc{color:teal}
.codehilite .vg{color:teal}
.codehilite .vi{color:teal}
.codehilite .il{color:#009999}
.codehilite .gc{color:#999;background-color:#EAF2F5}
README
html2canvas-php-proxy
PHP Proxy html2canvas
This script allows you to use html2canvas.js with different servers, ports and protocols (http, https),
preventing to occur “tainted” when exporting the <canvas> for image.
Others scripting language
You do not use PHP, but need html2canvas working with proxy, see other proxies:
- html2canvas proxy in asp.net (csharp)
- html2canvas proxy in asp classic (vbscript)
- html2canvas proxy in python (work any framework)
Problems and solutions
When adding an image that belongs to another domain in <canvas> and after that try to export the canvas
for a new image, a security error occurs (actually occurs is a security lock), which can return the error:
SecurityError: DOM Exception 18
Error: An attempt was made to break through the security policy of the user agent.
If using Google Maps (or google maps static) you can get this error in console:
Google Maps API error: MissingKeyMapError
You need get a API Key in: https://developers.google.com/maps/documentation/javascript/get-api-key
If get this error:
Access to Image at ‘file:///…’ from origin ‘null’ has been blocked by CORS policy: Invalid response. Origin ‘null’ is therefore not allowed access.
Means that you are not using an HTTP server, html2canvas does not work over the “file:///” protocol, use Apache, Nginx or IIS with PHP for work.
Follow
I ask you to follow me or “star” my repository to track updates
Run script in Cross-domain (data URI scheme)
(See details: brcontainer/html2canvas-php-proxy#9)
Note: Enable cross-domain in proxy server can consume more memory, but can be faster in execution it performs only one request at the proxy server.
Note: If the file html2canvasproxy.php is in the same domain that your project, you do not need to enable this option.
Note: Disable the “cross-domain” does not mean you will not be able to capture images from different servers, in other words, the “cross-domain” here refers to “html2canvas.js” (not necessarily the javascript file, but the place where runs) and the “html2canvas.php” are in different domains, the “cross-domain” here refers domain.
In some cases you may want to use this html2canvasproxy.php on a specific server, but the “html2canvas.js” and another server, this would cause problems in your project with the security causing failures in execution. In order to use security just set in the html2canvasproxy.php:
Enable data uri scheme for use proxy for all servers:
define('H2CP_DATAURI', true);
Disable data uri scheme:
define('H2CP_DATAURI', false);
Setup
Definition
Description
define('H2CP_PATH', 'cache');
Folder where the images are saved
define('H2CP_PERMISSION', 0666);
Set forlder permission (use 644 or 666 for remove execution for prevent sploits)
define('H2CP_CACHE', 60 * 5 * 1000);
Limit access-control and cache in seconds, define 0/false/null/-1 to not use “http header cache”
define('H2CP_TIMEOUT', 20);
Timeout from load Socket
define('H2CP_MAX_LOOP', 10);
Configure loop limit for redirects (location header)
define('H2CP_DATAURI', false);
Enable use of “data URI scheme”
define('H2CP_PREFER_CURL', true);
Prefer curl if avaliable or disable
define('H2CP_SSL_VERIFY_PEER', false);
Set false for disable SSL checking or true for enable (require config PHP.INI with curl.cainfo=/path/to/cacert.pem). You can set path manualy like this: define('H2CP_SSL_VERIFY_PEER', '/path/to/cacert.pem');
define('H2CP_ALLOWED_DOMAINS', '*');
* allow all domains, for subdomains use like this *.site.com, for fixed domains use , 'site.com,www.site.com' (string separed by commas)
define('H2CP_ALLOWED_PORTS', '80,443');
Config allowed ports (string separed by commas)
Usage
Note: Requires PHP5+
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>html2canvas php proxy</title>
<script src="html2canvas.js"></script>
<script>
//<![CDATA[
(function() {
window.onload = function(){
html2canvas(document.body, {
"logging": true, //Enable log (use Web Console for get Errors and Warnings)
"proxy": "html2canvasproxy.php",
"onrendered": function (canvas) {
var img = new Image();
img.onload = function() {
img.onload = null;
document.body.appendChild(img);
};
img.onerror = function() {
img.onerror = null;
if(window.console.log) {
window.console.log("Not loaded image from canvas.toDataURL");
} else {
alert("Not loaded image from canvas.toDataURL");
}
};
img.src = canvas.toDataURL("image/png");
}
});
};
})();
//]]>
</script>
</head>
<body>
<p>
<img alt="google maps static" src="http://maps.googleapis.com/maps/api/staticmap?center=40.714728,-73.998672&zoom=12&size=800x600&maptype=roadmap&sensor=false">
</p>
</body>
</html>
Using Web Console
If you have any problems with the script recommend to analyze the log use the Web Console from your browser:
* Firefox: https://developer.mozilla.org/en-US/docs/Tools/Browser_Console
* Chrome: https://developers.google.com/chrome-developer-tools/docs/console
* InternetExplorer: http://msdn.microsoft.com/en-us/library/gg589530%28v=vs.85%29.aspx
Get NetWork results:
* Firefox: https://hacks.mozilla.org/2013/05/firefox-developer-tool-features-for-firefox-23/
* Chrome: https://developers.google.com/chrome-developer-tools/docs/network
* InternetExplorer: http://msdn.microsoft.com/en-us/library/gg130952%28v=vs.85%29.aspx
An alternative is to diagnose problems accessing the link directly:
http://[DOMAIN]/[PATH]/html2canvasproxy.php?url=http%3A%2F%2Fmaps.googleapis.com%2Fmaps%2Fapi%2Fstaticmap%3Fcenter%3D40.714728%2C-73.998672%26zoom%3D12%26size%3D800x600%26maptype%3Droadmap%26sensor%3Dfalse%261&callback=html2canvas_0
Replace [DOMAIN] by your domain (eg. 127.0.0.1) and replace [PATH] by your project folder (eg. project-1/test), something like:
http://localhost/project-1/test/html2canvasproxy.php?url=http%3A%2F%2Fmaps.googleapis.com%2Fmaps%2Fapi%2Fstaticmap%3Fcenter%3D40.714728%2C-73.998672%26zoom%3D12%26size%3D800x600%26maptype%3Droadmap%26sensor%3Dfalse%261&callback=html2canvas_0
Changelog
Changelog moved to https://github.com/brcontainer/html2canvas-php-proxy/blob/master/CHANGELOG.md
Next versions
Details of future versions are being studied, in other words, can happen as can be forsaken ideas.
The ideas here are not ready or are not public in the main script, are only suggestions. You can offer suggestions on issues.
- Etag cache browser for use HTTP 304 (resources are reusable, avoiding unnecessary downloads)
- Cache from SOCKET, if not specified header cache in SOCKET, then uses settings by
DEFINE(); - Rewrinte script using PSR-4
- Support to
composer