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將canvas圖片發送至FB粉絲專頁
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Facebook Login JavaScript Example</title> | |
| <meta charset="UTF-8"> | |
| </head> | |
| <body> | |
| <script> | |
| // This is called with the results from from FB.getLoginStatus(). | |
| function statusChangeCallback(response) { | |
| console.log('statusChangeCallback'); | |
| console.log(response); | |
| // The response object is returned with a status field that lets the | |
| // app know the current login status of the person. | |
| // Full docs on the response object can be found in the documentation | |
| // for FB.getLoginStatus(). | |
| if (response.status === 'connected') { | |
| // Logged into your app and Facebook. | |
| testAPI(response.authResponse.accessToken); | |
| } else if (response.status === 'not_authorized') { | |
| // The person is logged into Facebook, but not your app. | |
| document.getElementById('status').innerHTML = 'Please log ' + | |
| 'into this app.'; | |
| } else { | |
| // The person is not logged into Facebook, so we're not sure if | |
| // they are logged into this app or not. | |
| document.getElementById('status').innerHTML = 'Please log ' + | |
| 'into Facebook.'; | |
| } | |
| } | |
| // This function is called when someone finishes with the Login | |
| // Button. See the onlogin handler attached to it in the sample | |
| // code below. | |
| function checkLoginState() { | |
| FB.getLoginStatus(function(response) { | |
| statusChangeCallback(response); | |
| }); | |
| } | |
| window.fbAsyncInit = function() { | |
| //checkLoginState(); | |
| }; | |
| // Here we run a very simple test of the Graph API after login is | |
| // successful. See statusChangeCallback() for when this call is made. | |
| </script> | |
| <!-- | |
| Below we include the Login Button social plugin. This button uses | |
| the JavaScript SDK to present a graphical Login button that triggers | |
| the FB.login() function when clicked. | |
| --> | |
| <input id="login" type="button" value="Login to FB"> | |
| <div id="status"> | |
| </div> | |
| <%= javascript_include_tag "canvas-to-blob.js" %> | |
| <script type="text/javascript"> | |
| var login = document.getElementById("login"); | |
| login.addEventListener("click",function() { | |
| FB.login(function(response) { | |
| checkLoginState(); | |
| }, { | |
| scope: 'publish_actions', | |
| return_scopes: true | |
| }); | |
| },false); | |
| function testAPI(token) { | |
| console.log('Welcome! Fetching your information.... '); | |
| FB.api('/me', function(response) { | |
| console.log('Successful login for: ' + response.name); | |
| document.getElementById('status').innerHTML = | |
| 'Thanks for logging in, ' + response.name + '!'; | |
| }); | |
| //102128959842877,1027783900583168 | |
| FB.api('102128959842877/feed', 'get', function(response) { | |
| if (!response || response.error) { | |
| console.log(response.error); | |
| } else { | |
| test = response; | |
| console.log(response); | |
| var imageObj = new Image(); | |
| imageObj.onload = function () { | |
| var callbackDone = function(formData) { | |
| // FB.api(response.data[0].id+'/comments', 'post', object, function(response) { | |
| // if (!response || response.error) { | |
| // console.log(response.error); | |
| // } else { | |
| // alert('Post ID: ' + response.id); | |
| // } | |
| // }); | |
| $.ajax({ | |
| url: "https://graph.facebook.com/"+ response.data[0].id +"/comments?access_token=" + token, | |
| type: "POST", | |
| data: formData, | |
| processData: false, | |
| contentType: false, | |
| cache: false, | |
| success: function (data) { | |
| console.log("success " + data); | |
| $("#poster").html("Posted Canvas Successfully"); | |
| }, | |
| error: function (shr, status, data) { | |
| console.log("error " + data + " Status " + shr.status); | |
| }, | |
| complete: function () { | |
| console.log("Posted to facebook"); | |
| } | |
| }); | |
| }; | |
| createBlob.call(this,token,callbackDone); | |
| }; | |
| imageObj.crossOrigin = "*"; | |
| imageObj.src = 'http://upload.wikimedia.org/wikipedia/commons/5/5c/It-%E5%AD%97.png'; | |
| } | |
| }); | |
| }; | |
| var createBlob = function(token,callback){ | |
| var canvas = document.createElement('canvas'); | |
| document.body.appendChild(canvas); | |
| var context = canvas.getContext('2d'); | |
| context.drawImage(this, 0, 0, this.width, this.height); | |
| if (canvas.toBlob) { | |
| canvas.toBlob(function (blob) { | |
| publishtoFB(blob,token,callback); | |
| }, 'image/png'); | |
| } | |
| } | |
| var publishtoFB = function(blob,token,callback){ | |
| var formData = new FormData(); | |
| formData.append('source', blob); | |
| var object = { | |
| source: formData, | |
| access_token: token | |
| }; | |
| callback(formData); | |
| } | |
| </script> | |
| </body> | |
| </html> |
fix FB.api
var publishtoFB = function(blob,token,callback){
var object = {
source: blob,
access_token: token
};
callback(formData);
}
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1.FB的api需要填app_id,和secret用以認證是這個應用程式的連線要求。
2.FB.login需要要求權限publish_actions,都同意才能po文，從respnose get token value.
3.FB.api('1027783900583168/feed', 'get',.....) get feed list.
4.publish(用一般發request的方式發，FB.api試不出來)
var formData = new FormData();
formData.append('source', blob);
$.ajax({
url: "https://graph.facebook.com/"+ response.data[0].id +"/comments?access_token=" + token,
type: "POST",
data: formData,
processData: false,
contentType: false,
cache: false,
success: function (data) {
console.log("success " + data);
$("#poster").html("Posted Canvas Successfully");
},
error: function (shr, status, data) {
console.log("error " + data + " Status " + shr.status);
},
complete: function () {
console.log("Posted to facebook");
}
});