从iOS应用程序通过node.js将图像上传到服务器

我正在开发一个iOS应用程序，我正在使用node.js服务器端脚本。 我面临从iOS应用程序上传图像到服务器的问题。 如果我从网页forms上传图像，它工作正常。 但是，如果从应用程序上传它不起作用。

  //test file h3 Pic Upload form(action='/pic_upload', method='post',enctype='multipart/form-data') | user_pic: input(type='file', name='user_pic') input(type='submit') //app.js var userlogin =require('./routes/userlogin'); app.post('/pic_upload', userlogin.picUpload); //userlogin.js //picUpload function exports.picUpload = function(req, res) { console.log(req.files); // showing undefined, when called from IOS app // pic upload script... }); 

我曾尝试从应用程序端发送图像作为数据或文件参数，但它没有工作。 如何从应用程序端发送文件参数，以便我可以轻松地将图像上传到服务器？ 请提出解决问题的方法。

Answer 1

此代码在我的应用程序中工作。 尝试这个。

 NSData *imgData = UIImageJPEGRepresentation(newImg, 0.2); NSString *str = @"displayImage"; NSString *urlString = @"http://some.url.com/post"; // create request NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData]; [request setHTTPShouldHandleCookies:NO]; [request setTimeoutInterval:30]; [request setURL:[NSURL URLWithString:urlString]]; [request setHTTPMethod:@"POST"]; NSString *boundary = [NSString stringWithFormat:@"---------------------------14737809831464368775746641449"]; // set Content-Type in HTTP header NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [request setValue:contentType forHTTPHeaderField: @"Content-Type"]; // post body NSMutableData *body = [NSMutableData data]; // add params (all params are strings) [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"currentEventID\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[@"52344457901000006" dataUsingEncoding:NSUTF8StringEncoding]]; // add image data if (imgData) { [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; // [body appendData:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"displayImage\"; filename=\"image.jpg\"\r\n"]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", str] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:imgData]; [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; } [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; // setting the body of the post to the reqeust [request setHTTPBody:body]; // set URL [request setURL:[NSURL URLWithString:urlString]]; NSString *bodyStr = [[NSString alloc]initWithData:body encoding:NSUTF8StringEncoding]; NSLog(@" %@",bodyStr); NSURLConnection *lot_Connection=[[NSURLConnection alloc]initWithRequest:request delegate:self]; if(lot_Connection) { webdata = [[NSMutableData alloc] init]; }