Nodejs POST 请求 multipart/form-data
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Nodejs POST request multipart/form-data
提问by giodamelio
I am trying to upload a photo via a POST request with the request module
我正在尝试通过 POST 请求上传照片 request module
According to the readme I should just be able to do this
根据自述文件，我应该能够做到这一点
var r = request.post("http://posttestserver.com/post.php", requestCallback)
var form = r.form()
form.append("folder_id", "0");
form.append("filename", fs.createReadStream(path.join(__dirname, "image.png")));
function requestCallback(err, res, body) {
console.log(body);
}
The problem is, this doesn't work. I get a reply from the test server saying it dumped 0 post variables.
问题是，这行不通。我收到测试服务器的回复，说它转储了 0 个帖子变量。
I have confirmed that the server is in working condition with this little html page
我已经通过这个小 html 页面确认服务器处于工作状态
<html>
<body>
<form action="http://posttestserver.com/post.php?dir=example" method="post" enctype="multipart/form-data">
File: <input type="file" name="submitted">
<input type="hidden" name="someParam" value="someValue"/>
<input type="submit" value="send">
</form>
</body>
</html>
So the question is, what am I doing wrong with the request module? Is there a better way to send multipart/form-datawith node?
所以问题是，我在请求模块上做错了什么？有没有更好的方式发送multipart/form-data节点？
采纳答案by giodamelio
After some more research, I decided to use the restler module. It makes the multipart upload really easy.
经过更多研究，我决定使用restler module. 它使分段上传非常容易。
fs.stat("image.jpg", function(err, stats) {
restler.post("http://posttestserver.com/post.php", {
multipart: true,
data: {
"folder_id": "0",
"filename": restler.file("image.jpg", null, stats.size, null, "image/jpg")
}
}).on("complete", function(data) {
console.log(data);
});
});
回答by ianmetcalf
So I just got done wrestling with this myself and here is what I learned:
所以我刚刚完成了自己的努力，这是我学到的：
It turns out that neither request or form-data are setting the content-length header for the generated body stream.
事实证明，请求或表单数据都没有为生成的正文流设置内容长度标头。
Here is the reported issue: https://github.com/mikeal/request/issues/316
这是报告的问题：https: //github.com/mikeal/request/issues/316
The solution posted by @lildemongets around this by:
@lildemon发布的解决方案通过以下方式解决了这个问题：
- Generating the FormData object
- Getting it's length
- Making the request and setting the form object and content-length header explicitly
- 生成 FormData 对象
- 得到它的长度
- 发出请求并明确设置表单对象和内容长度标头
Here is a modified version of your example:
这是您的示例的修改版本：
var request = require('request');
var FormData = require('form-data');
var form = new FormData();
form.append("folder_id", "0");
form.append("filename", fs.createReadStream(path.join(__dirname, "image.png")));
form.getLength(function(err, length){
if (err) {
return requestCallback(err);
}
var r = request.post("http://posttestserver.com/post.php", requestCallback);
r._form = form;
r.setHeader('content-length', length);
});
function requestCallback(err, res, body) {
console.log(body);
}
回答by wberry
I have working code that does exactly what your question states, with one exception. My file content is appended this way:
我的工作代码完全符合您的问题所述，只有一个例外。我的文件内容以这种方式附加：
form.append('file', new Buffer(...),
{contentType: 'image/jpeg', filename: 'x.jpg'});
To discover the final options argument I had to drill down into the source of form-data. But this gives me a working configuration. (Maybe it was what you were missing, but of course that will depend on the server.)
为了发现最终的选项参数，我必须深入到form-data. 但这给了我一个工作配置。（也许这是您缺少的东西，但这当然取决于服务器。）
回答by Miroslaw Dylag
I tried also request and form-data modules and was unable to upload a file. You can use superagent which works:
我还尝试了请求和表单数据模块，但无法上传文件。您可以使用有效的超级代理：
http://visionmedia.github.io/superagent/#multipart-requests.
http://visionmedia.github.io/superagent/#multipart-requests。
var request = require('superagent');
var agent1 = request.agent();
agent1.post('url/fileUpload')
.attach('file',__dirname + "/test.png")
.end(function(err, res) {
if (err) {
console.log(err)
}
});
回答by Gautam
Try request module. It works like any other normal post request
尝试请求模块。它的工作方式与任何其他正常的发布请求一样
var jsonUpload = { };
var formData = {
'file': fs.createReadStream(fileName),
'jsonUpload': JSON.stringify(jsonUpload)
};
var uploadOptions = {
"url": "https://upload/url",
"method": "POST",
"headers": {
"Authorization": "Bearer " + accessToken
},
"formData": formData
}
var req = request(uploadOptions, function(err, resp, body) {
if (err) {
console.log('Error ', err);
} else {
console.log('upload successful', body)
}
});
