感谢阅读。
我是iOS新手，我正在尝试使用iOS中的multi-part form encoding上传图片和文字。
curl等价物是这样的：curl -F "param1=value1" -F "param2=@testimage.jpg" "http://some.ip.address:5000/upload"
上面的curl命令会在JSON.
问题： 我一直收到HTTP 400请求，这意味着在编写HTTP POST Body时我做错了什么。
我做了什么： 作为参考，我尝试了Flickr API iOS app "POST size too large!"和Objective C: How to upload image and text using HTTP POST?。但是，我一直在获得HTTP 400.
我尝试了ASIHttpRequest但是遇到了一个不同的问题（回调从未被调用过）。但是，我没有进一步调查，因为我听说开发人员已停止支持该库：http://allseeing-i.com/[request_release];
有人可以帮帮我吗？
答案 0 :(得分：223)
以下是我的应用中的代码，用于将图片发布到我们的网络服务器：
// Dictionary that holds post parameters. You can set your post parameters that your server accepts or programmed to accept.
NSMutableDictionary* _params = [[NSMutableDictionary alloc] init];
[_params setObject:[NSString stringWithString:@"1.0"] forKey:[NSString stringWithString:@"ver"]];
[_params setObject:[NSString stringWithString:@"en"] forKey:[NSString stringWithString:@"lan"]];
[_params setObject:[NSString stringWithFormat:@"%d", userId] forKey:[NSString stringWithString:@"userId"]];
[_params setObject:[NSString stringWithFormat:@"%@",title] forKey:[NSString stringWithString:@"title"]];
// the boundary string : a random string, that will not repeat in post data, to separate post data fields.
NSString *BoundaryConstant = [NSString stringWithString:@"----------V2ymHFg03ehbqgZCaKO6jy"];
// string constant for the post parameter 'file'. My server uses this name: `file`. Your's may differ
NSString* FileParamConstant = [NSString stringWithString:@"file"];
// the server url to which the image (or the media) is uploaded. Use your server url here
NSURL* requestURL = [NSURL URLWithString:@""];
// create request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
[request setHTTPShouldHandleCookies:NO];
[request setTimeoutInterval:30];
[request setHTTPMethod:@"POST"];
// set Content-Type in HTTP header
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", BoundaryConstant];
[request setValue:contentType forHTTPHeaderField: @"Content-Type"];
// post body
NSMutableData *body = [NSMutableData data];
// add params (all params are strings)
for (NSString *param in _params) {
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@\r\n", [_params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];
}
// add image data
NSData *imageData = UIImageJPEGRepresentation(imageToPost, 1.0);
if (imageData) {
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", FileParamConstant] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
}
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];
// set the content-length
NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
// set URL
[request setURL:requestURL];
答案 1 :(得分：68)
XJones '答案就像魅力一样。
但他没有提及/声明变量_params，BoundaryConstant和requestURL。所以，我想把这个部分作为他的帖子的附加组件发布，以便将来可以帮助其他人。
// Dictionary that holds post parameters. You can set your post parameters that your server accepts or programmed to accept.
NSMutableDictionary* _params = [[NSMutableDictionary alloc] init];
[_params setObject:[NSString stringWithString:@"1.0"] forKey:[NSString stringWithString:@"ver"]];
[_params setObject:[NSString stringWithString:@"en"] forKey:[NSString stringWithString:@"lan"]];
[_params setObject:[NSString stringWithFormat:@"%d", userId] forKey:[NSString stringWithString:@"userId"]];
[_params setObject:[NSString stringWithFormat:@"%@",title] forKey:[NSString stringWithString:@"title"]];
// the boundary string : a random string, that will not repeat in post data, to separate post data fields.
NSString *BoundaryConstant = [NSString stringWithString:@"----------V2ymHFg03ehbqgZCaKO6jy"];
// string constant for the post parameter 'file'. My server uses this name: `file`. Your's may differ
NSString* FileParamConstant = [NSString stringWithString:@"file"];
// the server url to which the image (or the media) is uploaded. Use your server url here
NSURL* requestURL = [NSURL URLWithString:@""];
正如我提到的那样，这本身并不是一个答案，只是对 XJones'帖子的补充。
答案 2 :(得分：9)
http 发布图片以及通过帖子发送的用户名和密码 方法
NSString *str=[NSString stringWithFormat:@"%@registration.php",appdel.baseUrl];
NSString *urlString = [NSString stringWithFormat:@"%@",str];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
NSMutableData *body = [NSMutableData data];
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; name=\"file\"; filename=\"a.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imgData]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// parameter username
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"username\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[userName.text dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// parameter token
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"email\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[eMail.text dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// parameter method
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"pass\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[passWord.text dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
//parameter method
NSLog(@"%@",countryCode);
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"country\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[countryCode dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// close form
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
// NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSDictionary *dict=[NSJSONSerialization JSONObjectWithData:returnData options:NSJSONReadingMutableLeaves error:nil];
Nslog(@"%@",dict);
//
答案 3 :(得分：6)
使用AFNetworking;将其他参数放在参数字典中，并将图像数据附加到表单数据中。
//Upload Image Using AFNetworking
-(BOOL)uploadImageAFNetworkingWithURL:(NSString *)path andImage:(UIImage *)image andImageNameWithExtension:(NSString *)strImageName andParamDict:(NSDictionary *)dictParam andKeyForUploadingImage:(NSString *)keyUplaodImg{
NSData *imageData = UIImageJPEGRepresentation(image, 0.5);
NSString *strError = EMPTY_STRING;
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
[manager POST:path parameters:dictParam constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData name:keyUplaodImg fileName:strImageName mimeType:@"image/jpeg"];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"success = %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"error = %@", error);
NSLog(@"Response = %@", operation);
[strError stringByAppendingString:STR_ERR_MESSAGE];
}];
if(strError.length>0){
return NO;
}else{
return YES;
}
}
答案 4 :(得分：3)
以下是我用于上传文件的类似network kit library：
WebRequest *request = [[WebRequest alloc] initWithPath:@"...documents/create.json"];
// optional attributes
request.delegate = delegate;
request.notificationName = @"NotificationDocumentUploaded";
request.queue = myQueue;
NSMutableData *body = [NSMutableData data];
NSString *boundary = @"TeslaSchoolProjectFormBoundary";
[body appendPartName:@"document[name]" value:@"Test" boundary:boundary];
[body appendPartName:@"document[description]" value:@"This is a description" boundary:boundary];
[body appendPartName:@"document[category]" value:@"Drama" boundary:boundary];
...
[body appendPartName:@"commit" value:@"Save" boundary:boundary];
NSData *fileData = [[NSData alloc] initWithContentsOfURL:someFileURL];
[body appendPartFile:fileName name:@"document[file]" data:fileData mimeType:mimeType boundary:boundary];
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
NSString *bodyLength = [NSString stringWithFormat:@"%lu",(unsigned long)[body length]];
[request addValue:bodyLength forHTTPHeaderField:@"Content-Length"];
[request setValue:[NSString stringWithFormat:@"multipart/form-data; charset=utf-8; boundary=%@", boundary] forHTTPHeaderField:@"Content-Type"];
// optional values
[request addValue:@"gzip,deflate,sdch" forHTTPHeaderField:@"Accept-Encoding"];
[request addValue:@"max-age=0" forHTTPHeaderField:@"Cache-Control"];
[request addValue:@"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8" forHTTPHeaderField:@"Accept"];
[request addValue:@"en-US,en;q=0.8,hr;q=0.6,it;q=0.4,sk;q=0.2,sl;q=0.2,sr;q=0.2" forHTTPHeaderField:@"Accept-Language"];
[request setHTTPMethod:@"POST"];
[WebRequestProcessor process:request];
使用委托通知上传进度。
使用 notificationName 通知请求何时完成。
使用队列将此请求添加到您的操作队列中，以便在适当的时间处理它。
答案 5 :(得分：1)
这是从@xjones提供的代码翻译的工作swift代码。 非常感谢你的帮助伴侣。你的唯一方式对我有用。 我使用此方法将1个图像和另一个参数发送到在asp.net中创建的Web服务
while fruitList:
print(min(fruitList))
fruitList.remove(min(fruitList))
答案 6 :(得分：1)
这是一个Swift版本。请注意，如果您不想发送表单数据，则发送空表单边界仍然很重要。 Flask特别期望表单数据后跟文件数据，并且在没有第一个边界的情况下不会填充request.files。
let composedData = NSMutableData()
// Set content type header
let BoundaryConstant = "--------------------------3d74a90a3bfb8696"
let contentType = "multipart/form-data; boundary=\(BoundaryConstant)"
request.setValue(contentType, forHTTPHeaderField: "Content-Type")
// Empty form boundary
composedData.appendData("--\(BoundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
// Build multipart form to send image
composedData.appendData("--\(BoundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
composedData.appendData("Content-Disposition: form-data; name=\"file\"; filename=\"image.jpg\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
composedData.appendData("Content-Type: image/jpeg\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
composedData.appendData(rawData!)
composedData.appendData("\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
composedData.appendData("--\(BoundaryConstant)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
request.HTTPBody = composedData
// Get content length
let length = "\(composedData.length)"
request.setValue(length, forHTTPHeaderField: "Content-Length")
答案 7 :(得分：1)
在 Swift 2.2 中使用 NSURLConnection 类上传带有表单数据的图片：
func uploadImage(){
let imageData = UIImagePNGRepresentation(UIImage(named: "dexter.jpg")!)
if imageData != nil{
let str = "https://staging.mywebsite.com/V2.9/uploadfile"
let request = NSMutableURLRequest(URL: NSURL(string:str)!)
request.HTTPMethod = "POST"
let boundary = NSString(format: "---------------------------14737809831466499882746641449")
let contentType = NSString(format: "multipart/form-data; boundary=%@",boundary)
request.addValue(contentType as String, forHTTPHeaderField: "Content-Type")
let body = NSMutableData()
// append image data to body
body.appendData(NSString(format: "\r\n--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(NSString(format:"Content-Disposition: form-data; name=\"file\"; filename=\"img.jpg\"\\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(NSString(format: "Content-Type: application/octet-stream\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(imageData!)
body.appendData(NSString(format: "\r\n--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)
request.HTTPBody = body
do {
let returnData = try NSURLConnection.sendSynchronousRequest(request, returningResponse: nil)
let returnString = NSString(data: returnData, encoding: NSUTF8StringEncoding)
print("returnString = \(returnString!)")
}
catch let error as NSError {
print(error.description)
}
}
}
注意：始终使用sendAsynchronousRequest方法代替sendSynchronousRequest上传/下载数据，以避免阻止主线程。在这里，我使用sendSynchronousRequest仅用于测试目的。
答案 8 :(得分：0)
我可以向您展示一个示例，在 php 脚本的帮助下，将 .txt 文件上传到NSMutableURLRequest和NSURLSessionUploadTask的服务器
-(void)uploadFileToServer : (NSString *) filePath
{
NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://YourURL.com/YourphpScript.php"]];
[request setHTTPMethod:@"POST"];
[request addValue:@"File Name" forHTTPHeaderField:@"FileName"];
NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration:defaultConfigObject];
NSURLSessionUploadTask* uploadTask = [defaultSession uploadTaskWithRequest:request fromFile:[NSURL URLWithString:filePath] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
{
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
if (error || [httpResponse statusCode]!=202)
{
//Error
}
else
{
//Success
}
[defaultSession invalidateAndCancel];
}];
[uploadTask resume];
}
php脚本
<?php
$request_body = @file_get_contents('php://input');
foreach (getallheaders() as $name => $value)
{
if ($FileName=="FileName")
{
$header=$value;
break;
}
}
$uploadedDir = "directory/";
@mkdir($uploadedDir);
file_put_contents($uploadedDir."/".$FileName.".txt",
$request_body.PHP_EOL, FILE_APPEND);
header('X-PHP-Response-Code: 202', true, 202);
?>
答案 9 :(得分：0)
use below code. it will work fine for me.
+(void) sendHttpRequestWithArrayContent:(NSMutableArray *) array
ToUrl:(NSString *) strUrl withHttpMethod:(NSString *) strMethod
withBlock:(dictionary)block
{
if (![Utility isConnectionAvailableWithAlert:TRUE])
{
[Utility showAlertWithTitle:@"" andMessage:@"No internet connection available"];
}
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:strUrl]];
[request setTimeoutInterval:120.0];
[request setHTTPMethod:strMethod];
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
NSMutableData *body=[[NSMutableData alloc]init];
for (NSMutableDictionary *dict in array)
{
if ([[dict valueForKey:[[dict allKeys]objectAtIndex:0]] isKindOfClass:[NSString class]])
{
[body appendData:[self contentDataFormStringWithValue:[dict valueForKey:[[dict allKeys]objectAtIndex:0]] withKey:[[dict allKeys]objectAtIndex:0]]];
}
else if ([[dict valueForKey:[[dict allKeys]objectAtIndex:0]] isKindOfClass:[UIImage class]])
{
[body appendData:[self contentDataFormImage:[dict valueForKey:[[dict allKeys]objectAtIndex:0]] withKey:[[dict allKeys]objectAtIndex:0]]];
}
else if ([[dict valueForKey:[[dict allKeys]objectAtIndex:0]] isKindOfClass:[NSMutableDictionary class]])
{
[body appendData:[self contentDataFormStringWithValue:[dict valueForKey:[[dict allKeys]objectAtIndex:0]] withKey:[[dict allKeys]objectAtIndex:0]]];
}
else
{
NSMutableData *dataBody = [NSMutableData data];
[dataBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[dataBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"ipodfile.jpg\"\r\n",@"image"] dataUsingEncoding:NSUTF8StringEncoding]];
[dataBody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[dataBody appendData:[dict valueForKey:[[dict allKeys]objectAtIndex:0]]];
[body appendData:dataBody];
}
}
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError)
{
if (!data) {
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:[NSString stringWithFormat:@"%@",SomethingWentWrong] forKey:@"error"];
block(dict);
return ;
}
NSError *error = nil;
// NSString *str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
NSLog(@"%@",dict);
if (!dict) {
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:ServerResponceError forKey:@"error"];
block(dict);
return ;
}
block(dict);
}];
}
+(NSMutableData*) contentDataFormStringWithValue:(NSString*)strValue
withKey:(NSString *) key
{
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSMutableData *data=[[NSMutableData alloc]init];
[data appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[data appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key] dataUsingEncoding:NSUTF8StringEncoding]];
[data appendData:[[NSString stringWithFormat:@"%@",strValue] dataUsingEncoding:NSUTF8StringEncoding]]; // title
return data;
}
+(NSMutableData*) contentDataFormImage:(UIImage*)image withKey:
(NSString *) key
{
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"ipodfile.jpg\"\r\n",key] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
NSData *imageData=UIImageJPEGRepresentation(image, 0.40);
[body appendData:imageData];
return body;
}