我在尝试从superagent向Amazon S3执行CORS请求以上传文件时遇到问题。首先,我向node.js服务器询问该策略。我返回一个像这样的JSON对象:
{
s3PolicyBase64: '',
s3Signature: '',
s3Key: '',
s3ObjectKey: 'ftriana3185/inputData/input_fdc2f7f4b050c5884e5ac60a43bfc0d8ff26d549.csv' }
然后我尝试从superagent使用节点返回的策略上传本地文件。我的代码如下所示:
it('GET /inputFiles/s3Credential', function(done) {
var csvPath = './files/inputFileResource/countrylist.csv';
var request = {};
request.ext = 'csv';
clientAgent.get(localPath + '/inputFiles/s3Credential').send(request).end(function(response) {
var s3PolicyBase64 = response.body.s3PolicyBase64;
var s3Signature = response.body.s3Signature;
var s3Key = response.body.s3Key;
var s3ObjectKey = response.body.s3ObjectKey;
var request = clientAgent.post('bucket-name.s3.amazonaws.com')
.type('form')
.field('key', s3ObjectKey)
.field('AWSAccessKeyId', s3Key)
.field('acl', 'public-read')
.field('policy', s3PolicyBase64)
.field('signature', s3Signature)
.attach('mycsv', csvPath).end(function(response){
console.log(response);
});
});
});
我确信问题的形式是我正在做superagent的请求,因为我也有一个工作正常的html表单。那么,为此目的使用superagent的正确形式是什么?
答案 0 :(得分:2)
我今天试图做到这一点,并发现它在HTTP 400中失败了。我想superagent并不尊重http://aws.amazon.com/articles/1434中描述的精确表单布局。
我建议你使用" form-data"代替模块(https://github.com/felixge/node-form-data)。
这对我有用:
var FormData = require('form-data');
var fs = require('fs');
...
it('should upload to S3 with a multipart form', function (done) {
var policy = {/* your S3 policy */};
var form = new FormData();
form.append('AWSAccessKeyId', policy.AWSAccessKeyId);
form.append('key', policy.key);
form.append('policy', policy.policy);
form.append('signature', policy.signature);
form.append('file', fs.createReadStream('path/to/file'));
form.submit('https://YOUR_BUCKET.s3.amazonaws.com/', function (err, res) {
if (err) return done(err);
res.statusCode.should.be.exactly(204);
done();
});
});