我正在尝试使用Node.js将base64图像上传到FaceBook页面。我已经设法让上传工作与所有的多部分数据等,我应该从文件系统读取文件(即。使用fs.readFileSync('c:\a.jpg')
但是,如果我应该使用base64编码的图像并尝试上传它,它会给我以下错误:{"error":{"message":"(#1) An unknown error occurred","type":"OAuthException","code":1}}
我尝试过用new Buffer(b64string, 'base64');
将其转换为二进制文件并上传,但没有成功。
我已经在这个问题上挣扎了3天了,所以任何帮助都将不胜感激。
编辑:如果任何人也知道如何将base64转换为二进制文件并成功上传,那对我来说也是有效的。
编辑:代码片段
var postDetails = separator + newlineConstant + 'Content-Disposition: form-data;name="access_token"' + newlineConstant + newlineConstant + accessToken + newlineConstant + separator;
postDetails = postDetails + newlineConstant + 'Content-Disposition: form-data; name="message"' + newlineConstant + newlineConstant + message + newlineConstant;
//Add the Image information
var fileDetailsString = '';
var index = 0;
var multipartBody = new Buffer(0);
images.forEach(function (currentImage) {
fileDetailsString = fileDetailsString + separator + newlineConstant + 'Content-Disposition: file; name="source"; filename="Image' + index + '"' + newlineConstant + 'Content-Type: image/jpeg' + newlineConstant + newlineConstant;
index++;
multipartBody = Buffer.concat([multipartBody, new Buffer(fileDetailsString), currentImage]); //This is what I would use if Bianry data was passed in
currentImage = new Buffer (currentImage.toString('base64'), 'base64'); // The following lines are what I would use for base64 image being passed in (The appropriate lines would be enabled/disabled if I was using Binary/base64)
multipartBody = Buffer.concat([multipartBody, new Buffer(fileDetailsString), currentImage]);
});
multipartBody = Buffer.concat([new Buffer(postDetails), multipartBody, new Buffer(footer)]);
发布于 2013-11-06 20:05:23
上面的代码对我来说不是很有效(在type:"POST",
之后缺少逗号,数据URI到blob函数报告了错误。我得到了以下代码,以便在Firefox和Chrome中工作:
function PostImageToFacebook(authToken)
{
var canvas = document.getElementById("c");
var imageData = canvas.toDataURL("image/png");
try {
blob = dataURItoBlob(imageData);
}
catch(e) {
console.log(e);
}
var fd = new FormData();
fd.append("access_token",authToken);
fd.append("source", blob);
fd.append("message","Photo Text");
try {
$.ajax({
url:"https://graph.facebook.com/me/photos?access_token=" + authToken,
type:"POST",
data:fd,
processData:false,
contentType:false,
cache:false,
success:function(data){
console.log("success " + data);
},
error:function(shr,status,data){
console.log("error " + data + " Status " + shr.status);
},
complete:function(){
console.log("Posted to facebook");
}
});
}
catch(e) {
console.log(e);
}
}
function dataURItoBlob(dataURI) {
var byteString = atob(dataURI.split(',')[1]);
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
return new Blob([ab], { type: 'image/png' });
}
这是GitHub https://github.com/DanBrown180/html5-canvas-post-to-facebook-base64的代码
发布于 2013-05-08 19:16:23
我希望这将是有用的。只在javascript的帮助下上传照片到FB,你可以使用以下方法。这里需要的是imageData(这是base64格式的图像)和mime类型。
try {
blob = dataURItoBlob(imageData,mimeType);
} catch (e) {
console.log(e);
}
var fd = new FormData();
fd.append("access_token",accessToken);
fd.append("source", blob);
fd.append("message","Kiss");
try {
$.ajax({
url:"https://graph.facebook.com/" + <<userID received on getting user details>> + "/photos?access_token=" + <<user accessToken>>,
type:"POST",
data:fd,
processData:false,
contentType:false,
cache:false,
success:function(data){
console.log("success " + data);
},
error:function(shr,status,data){
console.log("error " + data + " Status " + shr.status);
},
complete:function(){
console.log("Ajax Complete");
}
});
} catch(e) {
console.log(e);
}
function dataURItoBlob(dataURI,mime) {
// convert base64 to raw binary data held in a string
// doesn't handle URLEncoded DataURIs
var byteString = window.atob(dataURI);
// separate out the mime component
// write the bytes of the string to an ArrayBuffer
//var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(byteString.length);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
// write the ArrayBuffer to a blob, and you're done
var blob = new Blob([ia], { type: mime });
return blob;
}
//编辑AJAX语法
发布于 2014-03-18 07:29:22
丹的答案效果最好。在这个场景中,另一个可能有用的东西是用于发布照片的可选参数:'no_story‘。这个参数缺省为true,强制照片发布跳过用户的墙。通过添加
fd.append("no_story", false);
您可以使用照片帖子更新用户的墙。
我本想留下这段评论的,但是...50名代表发表评论。
https://stackoverflow.com/questions/16214300
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