OSS 上传图片失败

Question

Http request 内容：

POST / HTTP/1.1
Host: microshop.oss-cn-hangzhou.aliyuncs.com
Content-Type: multipart/form-data; boundary="IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc"
Connection: keep-alive
Accept: */*
User-Agent: %E7%99%BEe%E5%9B%BD%E9%99%85/4 CFNetwork/808.1.4 Darwin/16.0.0
Content-Length: 217432
Accept-Language: zh-cn
Accept-Encoding: gzip, deflate

--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="name"

photo.jpg
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="key"

res/d021*****b4c3c91d83
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="policy"

eyJleHBpcm*********DowMC4wMDBaIiwiY29uZGl0aW9ucyI6W3siYnVja2V0IjoibWljcm9zaG9wIn0sWyJjb250ZW50LWxlbmd0aC1yYW5nZSIsMSwxMDczNzQxODI0XV19
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="OSSAccessKeyId"

vT********xpkt
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="success_action_status"

200
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="callback"

eyJjYWxsYmFja1VybCI6Imh0dHA6Ly9xYzV6LnJvc2VwaWUuY29tL3Jvc2VhZG1pbi9ybXMvb3BlbnNlcnZpY2***********taW1lVHlwZX0maGVpZ2h0PSR7aW1hZ2VJbmZvLmhlaWdodH0md2lkdGg9JHtpbWFnZUluZm8ud2lkdGh9IiwiY2FsbGJhY2tCb2R5VHlwZSI6ImFwcGxpY2F0aW9uL3gtd3d3LWZvcm0tdXJsZW5jb2RlZCJ9
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="signature"

9vmiZcJ5t*******PA2jqBzRY8=
--IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc
content-disposition: form-data; name="file"; filename="photo.jpg"
content-type: image/jpeg

����

忽略掉那些 ****** ，
后面的图片内容就没有复制全部了；

返回错误：

<Error> 
    <Code>MalformedPOSTRequest</Code> 
    <Message>The body of your POST request is not well-formed multipart/form-data</Message> 
    <RequestId>583FF595355BE80EF3671030</RequestId> 
    <HostId>microshop.oss-cn-hangzhou.aliyuncs.com</HostId> 
</Error>

有人碰到类似的情况吗？

Answer 1

找到原因了 ：

Content-Type: multipart/form-data; boundary="IaX0GHJdM5gRIXY_S37dFzTjrYcygaI4lr8JjgHY_hUURrbjP8LbpzJ7KEQ2AbcY5yU3Jc"

boundary 后面 不能加", ReactNative 的坑。。

需要修改/node_modules/react-native/Libraries/Network/RCTNetworking.mm:119
为
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", _boundary];

Answer 2

参见：PostObject错误及排查，错误第一项。
可能是表单域的锅吧，看下是不是顺序什么的有问题。
也可以参见拙作：前端图片直传OSS试验