使用PUT上传Alamofire图片 [英] Alamofire image upload with PUT
问题描述
我目前正在尝试将具有预签名网址的图片上传到亚马逊.
I'm currently trying to upload an Image to amazon with pre-signed url.
它的工作方式是,我发出一个GET请求以获取预签名的URL,然后是一个PUT请求以使用从GET请求返回的URL上载图像.
The way it works is, I make a GET request to get the pre-signed URL and than a PUT request to upload the image by using the url returned from the GET request.
这两个规则是:Content-Type必须为image \ jpeg,http方法必须为PUT.
The two rules are: the Content-Type needs to be image\jpeg and the http methods must be PUT.
因此,当前我的上传代码返回200,但亚马逊拒绝了数据.
So, currently my upload code returns 200 but amazon rejects the data.
这是我的代码:
The actual url returned for the upload is: https://mimik-apps-channel.s3-us-west-2.amazonaws.com/profiles/2312528782074206653.jpg?X-Amz-Expires=3600&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJ36SCZW7WGBAW7CQ/20170202/us-west-2/s3/aws4_request&X-Amz-Date=20170202T102202Z&X-Amz-SignedHeaders=host&X-Amz-Signature=007ad8694fe1ed83b08d4890f17b9985e169f7ab8fcd7b0d648a383c69ebc748
var headers = Alamofire.SessionManager.defaultHTTPHeaders
headers["Content-Type"] = "image/jpeg"
let URL = try! URLRequest(url: url, method: .put, headers: headers)
Alamofire.upload(multipartFormData: { (multipartFormData) in
let compressionQuality: CGFloat = 0.8
guard let imageData = UIImageJPEGRepresentation(image, compressionQuality) else {
print("Unable to get JPEG representation for image \(image)")
return
}
multipartFormData.append(imageData, withName: "image.jpg", mimeType: "image/jpeg")
// code
}, with: URL, encodingCompletion: { (result) in
switch result {
case .success(let upload, _, _):
upload.responseJSON { response in
print("SUCCESS -> \(response.request?.allHTTPHeaderFields)")
}
case .failure(let encodingError):
print(encodingError)
}
})
我怀疑当我打印http标头时,Content-Type总是显示multipart/form-data而不是我需要的image/jpeg,但是目前我不知道该怎么做.
I suspect that when I print the http headers the Content-Type always shows multipart/form-data and not the image/jpeg that I need, but currently I'm lost on what to do to solve this.
推荐答案
我最近实际上有相同的要求(除了我需要PNG而不是JPG).
I actually recently had the same requirements (except I needed PNG instead of JPG).
这是您的处理方法.
let compressionQuality: CGFloat = 0.8
guard let imageData = UIImageJPEGRepresentation(image, compressionQuality) else {
print("Unable to get JPEG representation for image \(image)")
return
}
let headers = [
"Content-Type": "image/jpeg"
]
// presignedUrl is a String
Alamofire.upload(imageData, to: presignedUrl, method: .put, headers: headers)
.responseData {
response in
guard let httpResponse = response.response else {
print("Something went wrong uploading")
return
}
if let publicUrl = presignedUrl.components(separatedBy: "?").first {
print(publicUrl)
}
}
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