Marshall.Yang Marshall.Yang - 4 months ago 29x
iOS Question

upload an image using AFNetworking to the server by node.js failed

I am learning AFNetworking(v3.0) these days, I try to use it to upload an image to my server writen by node.js + express. I found every time I tried to call upload method in ***.m I got error message, said the "Request failed: unacceptable content-type: text/html"(part of error message)", is that a problem maybe my request is wrong? Or the sever side's problem? I am new to node.js and express. What I guess is type problem? maybe but I don't know. If you know~ please reply me ~ thanks!

iOS Side:

NSDictionary *params = @{@"enctype": @"multipart/form-data"};

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://localhost:8080/images" parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) {
NSData *data = UIImagePNGRepresentation(self.imageView.image);
[formData appendPartWithFileData:data name:@"pic" fileName:@"pic.png" mimeType:@"image/png"];
} error:nil];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

NSURLSessionUploadTask *uploadTask;
uploadTask = [manager uploadTaskWithStreamedRequest:request progress:nil completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
if (error) {
NSLog(@"Error: %@", error);
} else {

[uploadTask resume];

Server Side:

router.route('/images').post(multiparty(), function(req, res) {
fs.readFile(req.files.image.path, function(err, data) {
var imageName =;

if (!imageName) {
console.log("there was an error");
res.json({message:"error", code:500});
} else {
var newPath = __dirname + "/uploads/fullsize/" + imageName;
fs.writeFile(newPath, data, function(err) {
res.json({message: 'successfully upload image!', code:200});



Your iOS code is using pic as the field name, not image like you are referencing on the server side. One or the other would need to be changed.