Wenn Sie PhantomJS zum Einbetten aller Bilder einer Webseite verwenden, werden Warnungen ausgegeben, die jedoch funktionieren.
Ich versuche, eine Webseite durch Einbetten aller Bilder (und anderer externer Ressourcen, sobald ich diesen Punkt überschritten habe) in eine einzelne Datei zu konvertieren. So starte ich PhantomJs:
./phantomjs --web-security=false ./embed_images.js http://localhost/index.html > output.txt
nd hier ist dasembed_images.js:
var page = require('webpage').create(),
system = require('system'),
address;
if (system.args.length === 1) {
console.log('Usage: embed_images.js <some URL>');
phantom.exit(1);
}
else {
page.onConsoleMessage = function(msg) {
console.log(msg);
};
address = system.args[1];
page.open(address, function(status) {
page.evaluate(function() {
function embedImg(org) {
var img = new Image();
img.src = org.src;
img.onload = function() {
var canvas = document.createElement("canvas");
canvas.width = this.width;
canvas.height = this.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(this, 0, 0);
var dataURL = canvas.toDataURL("image/png");
org.src = dataURL;
console.log(dataURL);
}
}
var imgs = document.getElementsByTagName("img");
for (var index=0; index < imgs.length; index++) {
embedImg(imgs[index]);
}
});
phantom.exit()
});
}
Wenn ich den genannten Befehl ausführe, ergibt sich eine Datei wie diese:
Unsafe JavaScript attempt to access frame with URL from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Es gibt mehrere Instanzen der obigen Fehlermeldung. Um zu testen, was nicht stimmt, habe ich den folgenden Code in der Chromium-Konsole ausgeführt:
function embedImg(org) {
var img = new Image();
img.src = org.src;
img.onload = function() {
var canvas = document.createElement("canvas");
canvas.width = this.width;
canvas.height = this.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(this, 0, 0);
var dataURL = canvas.toDataURL("image/png");
org.src = dataURL;
console.log(dataURL);
}
}
var imgs = document.getElementsByTagName("img");
for (var index=0; index < imgs.length; index++) {
embedImg(imgs[index]);
}
Und es funktioniert einwandfrei (meine Webseite verweist nicht auf domänenübergreifende Bilder)! Alle Bilder werden in die HTML-Seite eingebettet. Weiß jemand woran das liegen könnte?
Hier ist meinsindex.htmlnhalt der @ -Datei:
<!DOCTYPE html >
<html>
<head>
<meta charset="utf-8" />
</head>
<body>
<img src="1.png" >
</body>
</html>
Und tatsächliche Ausgabe output.txt):
Unsafe JavaScript attempt to access frame with URL from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file://./embed_images.js. Domains, protocols and ports must match.
Das Seltsame ist, dass ich zwar nur ein Bild auf meiner Seite habe, aber es gibt zahlreiche Fehlermeldungen!
Ich benutze phantomjs-1.9.8-linux-x86_64.