使用curl将文件上传POST数据
我想使用cURL不仅在HTTP POST中发送数据参数，而且还要上传具有特定表单名称的文件。 我应该怎么做呢？
HTTP发布参数：
userid = 12345 filecomment =这是一个图像文件
HTTP文件上传：文件位置= /home/user1/Desktop/test.jpg file = image的表单名称（对应PHP侧的$ _FILES ['image']）
我认为cURL命令的一部分如下：
curl -d "userid=1&filecomment=This is an image file" --data-binary @"/home/user1/Desktop/test.jpg" localhost/uploader.php
我得到的问题如下：
Notice: Undefined index: image in /var/www/uploader.php
问题是我正在使用$ _FILES ['image']来获取PHP脚本中的文件。
如何相应地调整我的cURL命令？
您需要使用-F选项：
-F/--form <name=content> Specify HTTP multipart POST data (H)
尝试这个：
curl
-F "userid=1"
-F "filecomment=This is an image file"
-F "image=@/home/user1/Desktop/test.jpg"
localhost/uploader.php
将用户标识捕获为路径变量（推荐）：
curl -i -X POST -H "Content-Type: multipart/form-data"
-F "data=@test.mp3" http://mysuperserver/media/1234/upload/
捕捉用户标识作为表单的一部分：
curl -i -X POST -H "Content-Type: multipart/form-data"
-F "data=@test.mp3;userid=1234" http://mysuperserver/media/upload/
这是我的解决方案，我一直在阅读很多帖子，他们真的很有帮助。 最后我为小文件编写了一些代码，使用cURL和PHP，我认为它非常有用。
public function postFile()
{
$file_url = "test.txt"; //here is the file route, in this case is on same directory but you can set URL too like "http://examplewebsite.com/test.txt"
$eol = "rn"; //default line-break for mime type
$BOUNDARY = md5(time()); //random boundaryid, is a separator for each param on my post curl function
$BODY=""; //init my curl body
$BODY.= '--'.$BOUNDARY. $eol; //start param header
$BODY .= 'Content-Disposition: form-data; name="sometext"' . $eol . $eol; // last Content with 2 $eol, in this case is only 1 content.
$BODY .= "Some Data" . $eol;//param data in this case is a simple post data and 1 $eol for the end of the data
$BODY.= '--'.$BOUNDARY. $eol; // start 2nd param,
$BODY.= 'Content-Disposition: form-data; name="somefile"; filename="test.txt"'. $eol ; //first Content data for post file, remember you only put 1 when you are going to add more Contents, and 2 on the last, to close the Content Instance
$BODY.= 'Content-Type: application/octet-stream' . $eol; //Same before row
$BODY.= 'Content-Transfer-Encoding: base64' . $eol . $eol; // we put the last Content and 2 $eol,
$BODY.= chunk_split(base64_encode(file_get_contents($file_url))) . $eol; // we write the Base64 File Content and the $eol to finish the data,
$BODY.= '--'.$BOUNDARY .'--' . $eol. $eol; // we close the param and the post width "--" and 2 $eol at the end of our boundary header.
$ch = curl_init(); //init curl
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'X_PARAM_TOKEN : 71e2cb8b-42b7-4bf0-b2e8-53fbd2f578f9' //custom header for my api validation you can get it from $_SERVER["HTTP_X_PARAM_TOKEN"] variable
,"Content-Type: multipart/form-data; boundary=".$BOUNDARY) //setting our mime type for make it work on $_FILE variable
);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/1.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0'); //setting our user agent
curl_setopt($ch, CURLOPT_URL, "api.endpoint.post"); //setting our api post url
curl_setopt($ch, CURLOPT_COOKIEJAR, $BOUNDARY.'.txt'); //saving cookies just in case we want
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); // call return content
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1); navigate the endpoint
curl_setopt($ch, CURLOPT_POST, true); //set as post
curl_setopt($ch, CURLOPT_POSTFIELDS, $BODY); // set our $BODY
$response = curl_exec($ch); // start curl navigation
print_r($response); //print response
}
有了这个，我们应该在“api.endpoint.post”上发布下面的变量。 您可以使用此脚本轻松测试，并且您应该在最后一行的函数postFile()上接收此调试。
print_r($response); //print response
public function getPostFile()
{
echo "nn_SERVERn";
echo "<pre>";
print_r($_SERVER['HTTP_X_PARAM_TOKEN']);
echo "/<pre>";
echo "_POSTn";
echo "<pre>";
print_r($_POST['sometext']);
echo "/<pre>";
echo "_FILESn";
echo "<pre>";
print_r($_FILEST['somefile']);
echo "/<pre>";
}
它应该工作得很好，它们可能是更好的解决方案，但这种方法很有用，并且对于理解Boundary和multipart / from-data MIME如何在PHP和cURL库中工作非常有帮助。
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