php上傳圖片到微博圖牀

微博是個好圖牀，上傳後就能夠經過一個url來訪問了。今天就用php來上傳圖片到微博，這也是來自sf的一個問題, 裏面還提到一個python版本.

有2種方式實現上傳圖片:

若是要用 http://picupload.service.weib... 這個 URL 的話POST 參數必須是 b64_data，值爲通過 base64 編碼後的字符串。

若是要使用 pic1 參數的話，則要用 multipart 方式進行上傳，且 URL 中必須包含 cb 參數，cb 參數的值爲 http://weibo.com/aj/static/up... 加(js)時間戳

如下爲php實現,感謝這個問題下@consatan 的回覆，這裏作個總結。

使用base64上傳

$cookie = 'your cookie';//登陸微博network獲取
$ch = curl_init('http://picupload.service.weibo.com/interface/pic_upload.php'
    . '?mime=image%2Fjpeg&data=base64&url=0&markpos=1&logo=&nick=0&marks=1&app=miniblog');

curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_VERBOSE => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["Cookie: $cookie"],
    CURLOPT_POSTFIELDS => ['b64_data' => base64_encode(file_get_contents('./sf.jpg'))],
]);

$res = curl_exec($ch);
curl_close($ch);
print_r($res);
/*
{"code":"A00006","data":{"count":1,"data":"eyJ1aWQiOjMyNDMwMjYyMzcsImFwcCI6Im1pbmlibG9nIiwiY291bnQiOjEsInRpbWUiOjE0ODc3NDIyMDYuMzIxLCJwaWNzIjp7InBpY18xIjp7IndpZHRoIjo1MTAsInNpemUiOjUyOTMzLCJyZXQiOjEsImhlaWdodCI6MzMwLCJuYW1lIjoicGljXzEiLCJwaWQiOiJjMTRjYTczZGx5MWZjejcxejNyN25qMjBlNjA5NnE1ZiJ9fX0=","pics":{"pic_1":{"width":510,"size":52933,"ret":1,"height":330,"name":"pic_1","pid":"c14ca73dly1fcz71z3r7nj20e6096q5f"}}}}
$data=base64_decode($res['data']['data'])
{"uid":3243026237,"app":"miniblog","count":1,"time":1487742206.321,"pics":{"pic_1":{"width":510,"size":52933,"ret":1,"height":330,"name":"pic_1","pid":"c14ca73dly1fcz71z3r7nj20e6096q5f"}}}
*/
//c14ca73dly1fcz71z3r7nj20e6096q5f就是微博圖片id，訪問http://ww3.sinaimg.cn/large/c14ca73dly1fcz39h7mo3j20e6096q5f便可打開圖片,這裏我上傳的是sf的廣告圖。

multipart 方式上傳

$cookie = 'your cookie';//登陸微博network獲取
$post_data['pic1']=new CURLFile(realpath('sf.jpg'));
$time=substr(strval(microtime(true) * 1000), 0, 13) . 1;
        $url="http://picupload.service.weibo.com/interface/pic_upload.php?mime=image%2Fjpeg&data=base64&url=0&markpos=1&logo=&nick=0&marks=1&app=miniblog&cb=http://weibo.com/aj/static/upimgback.html?_wv=5&callback=STK_ijax_".time();
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_COOKIE, $cookie); 
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//multipart 方式上傳須要注意傳遞的參數是數組，不是字符串
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
//curl_setopt($ch, CURLOPT_HEADER, 1);
// curl_setopt($ch, CURLOPT_NOBODY, 0);
$output = curl_exec($ch);
$rinfo=curl_getinfo($ch); 
print_r($output);
curl_close($ch);
/*
{"code":"A20001","data":{"count":2,"data":"eyJ1aWQiOjMyNDMwMjYyMzcsImFwcCI6Im1pbmlibG9nIiwiY291bnQiOjIsInRpbWUiOjE0ODc3MzQzMzUuNDU3LCJwaWNzIjp7InBpY18yIjp7InJldCI6LTIsIm5hbWUiOiJwaWNfMiJ9LCJwaWNfMSI6eyJ3aWR0aCI6NTEwLCJzaXplIjo1MjkzMywicmV0IjoxLCJoZWlnaHQiOjMzMCwibmFtZSI6InBpY18xIiwicGlkIjoiYzE0Y2E3M2RseTFmY3ozOWg3bW8zajIwZTYwOTZxNWYifX19","pics":{"pic_2":{"ret":-2,"name":"pic_2"},"pic_1":{"width":510,"size":52933,"ret":1,"height":330,"name":"pic_1","pid":"c14ca73dly1fcz39h7mo3j20e6096q5f"}}}} 
*/
//從結果中獲取pid便可,這裏發現上傳同一張圖片返回的pid是相同的，看來微博有處理，也許是比較文件的md5.

這裏須要注意php不一樣版本上傳圖片的處理,參考這個連接 ，傳統上，PHP的cURL支持經過在數組數據中，使用「@+文件全路徑」的語法附加文件，供cURL讀取上傳,但PHP從5.5開始引入了新的CURLFile類用來指向文件,因此作個處理:

if (class_exists('\CURLFile')) {
    $field = array('fieldname' => new \CURLFile(realpath($filepath)));
} else {
    $field = array('fieldname' => '@' . realpath($filepath));
}