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https://github.com/moparisthebest/mail
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Merge pull request #78 from whiteout-io/dev/WO-409
[WO-409] Render images in html mails
This commit is contained in:
Tankred Hase
commit
ca0f91af27
@ -338,17 +338,40 @@ define(function(require) {
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ngModule.directive('frameLoad', function($sce, $timeout) {
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return function(scope, elm, attrs) {
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scope.$watch(attrs.frameLoad, function(value) {
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var html = value;
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scope.html = undefined;
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if (value) {
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$timeout(function() {
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// wrap in html doc with scrollable html tag, since chrome apps does not scroll by default
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var prefix = '<!DOCTYPE html><html style="overflow-y: auto"><head></head><body>';
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var suffix = '</body></html>';
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// open links in new window, otherwise the sandbox with not open them
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var clickableHtml = value.replace(/<a /g, '<a target="_blank" ');
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scope.html = $sce.trustAsHtml(prefix + clickableHtml + suffix);
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});
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var iframe = elm[0];
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if (!html) {
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return;
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}
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// if there are image tags in the html?
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var hasImages = /<img[^>]+\bsrc=['"][^'">]+['"]/ig.test(html);
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scope.showImageButton = hasImages;
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// inital loading
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$timeout(function() {
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scope.html = true;
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iframe.contentWindow.postMessage({
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html: html,
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removeImages: hasImages // avoids doing unnecessary work on the html
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}, '*');
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});
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// no need to add a scope function to reload the html if there are no images
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if (!hasImages) {
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return;
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}
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// reload WITH images
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scope.displayImages = function() {
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scope.showImageButton = false;
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iframe.contentWindow.postMessage({
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html: html,
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removeImages: false
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}, '*');
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};
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});
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};
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});
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@ -639,13 +639,13 @@ define(function(require) {
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var localMessage = localMessages[0];
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// treat attachment and non-attachment body parts separately:
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// we need to fetch the content for non-attachment body parts (encrypted, signed, text, html)
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// we need to fetch the content for non-attachment body parts (encrypted, signed, text, html, resources referenced from the html)
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// but we spare the effort and fetch attachment content later upon explicit user request.
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var contentParts = localMessage.bodyParts.filter(function(bodyPart) {
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return bodyPart.type !== "attachment";
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return bodyPart.type !== "attachment" || (bodyPart.type === "attachment" && bodyPart.id);
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});
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var attachmentParts = localMessage.bodyParts.filter(function(bodyPart) {
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return bodyPart.type === "attachment";
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return bodyPart.type === "attachment" && !bodyPart.id;
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});
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// do we need to fetch content from the imap server?
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@ -747,10 +747,12 @@ define(function(require) {
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message.attachments = filterBodyParts(root, 'attachment');
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message.body = body;
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message.html = _.pluck(filterBodyParts(root, 'html'), 'content').join('\n');
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inlineExternalImages(message);
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done();
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}
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function done(err) {
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message.loadingBody = false;
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callback(err, err ? undefined : message);
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@ -852,6 +854,7 @@ define(function(require) {
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// remove the pgp-signature from the attachments
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return attmt.mimeType === "application/pgp-signature";
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});
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inlineExternalImages(message);
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message.decrypted = true;
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@ -1150,7 +1153,7 @@ define(function(require) {
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/**
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* Updates the folder information from imap (if we're online). Adds/removes folders in account.folders,
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* if we added/removed folder in IMAP. If we have an uninitialized folder that lacks folder.messages,
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* if we added/removed folder in IMAP. If we have an uninitialized folder that lacks folder.messages,
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* all the locally available messages are loaded from memory.
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*
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* @param {Function} callback Invoked when the folders are up to date
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@ -1472,5 +1475,36 @@ define(function(require) {
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return result;
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}
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/**
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* Helper function that looks through the HTML content for <img src="cid:..."> and
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* inlines the images linked internally. Manipulates message.html as a side-effect.
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* If no attachment matching the internal reference is found, or constructing a data
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* uri fails, just remove the source.
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*
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* @param {Object} message DTO
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*/
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function inlineExternalImages(message) {
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message.html = message.html.replace(/(<img[^>]+\bsrc=['"])cid:([^'">]+)(['"])/ig, function(match, prefix, src, suffix) {
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var localSource = '',
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payload = '';
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var internalReference = _.findWhere(message.attachments, {
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id: src
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});
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if (internalReference) {
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for (var i = 0; i < internalReference.content.byteLength; i++) {
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payload += String.fromCharCode(internalReference.content[i]);
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}
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try {
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localSource = 'data:application/octet-stream;base64,' + btoa(payload); // try to replace the source
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} catch (e) {}
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}
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return prefix + localSource + suffix;
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});
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}
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return EmailDAO;
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});
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@ -32,5 +32,9 @@
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"background": {
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"scripts": ["background.js"]
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}
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},
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"sandbox": {
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"pages": ["sandbox.html"],
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"content_security_policy": "sandbox allow-popups allow-scripts; default-src 'self'; object-src 'none'; style-src 'self' 'unsafe-inline'; img-src *"
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}
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}
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11
src/sandbox.html
Normal file
11
src/sandbox.html
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@ -0,0 +1,11 @@
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<!DOCTYPE html>
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<html style="overflow-y: auto">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<script src="sandbox.js"></script>
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</head>
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<body></body>
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</html>
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20
src/sandbox.js
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20
src/sandbox.js
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@ -0,0 +1,20 @@
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(function() {
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'use strict';
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// set listener for event from main window
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window.addEventListener('message', function(e) {
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var html = e.data.html;
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// make links open in a new window
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html = html.replace(/<a /g, '<a target="_blank" ');
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// remove sources where necessary
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if (e.data.removeImages) {
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html = html.replace(/(<img[^>]+\b)src=['"][^'">]+['"]/ig, function(match, prefix) {
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return prefix;
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});
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}
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document.body.innerHTML = html;
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}, false);
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})();
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@ -114,6 +114,17 @@
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}
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}
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.showImages {
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flex-shrink: 0;
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padding: 1em;
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text-align: center;
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a {
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text-decoration: none;
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color: $color-blue;
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}
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}
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iframe {
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flex-grow: 1;
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margin-top: 1.75em;
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@ -53,8 +53,12 @@
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</div><!--/.working-->
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</div><!--/.working-wrapper-->
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<div class="showImages" ng-show="html && showImageButton">
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<a href='#' ng-click="displayImages(); $event.preventDefault()">Display images</a>
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</div>
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<!-- Render html body in sandboxed iframe -->
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<iframe ng-show="html" sandbox="allow-popups" srcdoc="{{html}}"
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<iframe ng-show="html" sandbox="allow-popups allow-scripts" src="sandbox.html"
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frame-load="state.mailList.selected.html">
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</iframe>
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