ios Télécharger une image et du texte à l'aide de HTTP POST

Question

Merci de votre lecture.

Je suis nouveau sur iOS et j'essaie de télécharger une image et un texte à l'aide de la fonction multi-part form encoding dans iOS.

El curl l'équivalent est quelque chose comme ceci : curl -F "param1=value1" -F "param2=@testimage.jpg" "[http://some.ip.address:5000/upload](http://some.ip.address:5000/upload)"

El curl La commande ci-dessus renvoie la réponse correcte attendue dans JSON.

Problème : Je continue à recevoir une demande HTTP 400, ce qui signifie que je fais quelque chose de mal en composant le corps HTTP POST.

Ce que j'ai fait : Pour une certaine référence, j'ai essayé Application iOS de l'API Flickr : "POST size too large ! y Objective C : Comment télécharger une image et du texte avec HTTP POST ? . Mais, je continue à obtenir un HTTP 400.

J'ai essayé le ASIHttpRequest mais j'ai eu un problème différent (le callback n'a jamais été appelé). Mais je n'ai pas cherché plus loin car j'ai entendu dire que le développeur avait cessé de supporter la bibliothèque : http://allseeing-i.com/ [request_release] ;

Quelqu'un pourrait-il m'aider ?

Answer 1

Voici le code de mon application pour envoyer une image à notre serveur web :

// 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:@"%lu",(unsigned long) [body length]];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];

// set URL
[request setURL:requestURL];

Answer 2

XJones La réponse a fonctionné à merveille.

Mais il n'a pas mentionné/déclaré de variables _params , BoundaryConstant y requestURL . J'ai donc pensé à poster cette partie en complément de son message, afin que cela puisse aider d'autres personnes à l'avenir.

// 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:@""]; 

Comme je l'ai dit plus tôt, ce n'est pas une réponse en soi, mais un complément à la réponse de la Commission. XJones' poste.

Answer 3

Para http envoi de l'image du poste et du nom d'utilisateur et du mot de passe par poste méthode

 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);
 //

Answer 4

Utiliser AFNetworking ; Mettre les autres paramètres dans le dictionnaire des paramètres et ajouter les données de l'image dans les données du formulaire.

//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;
    }
}

Answer 5

Voici mon similaire bibliothèque du kit réseau pour le téléchargement de fichiers sous forme de formulaire multipart :

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];

Utilisez le délégué pour notifier la progression du téléchargement.

Utilisez le notificationName pour notifier la fin de la demande.

Utilisez le file d'attente pour avoir ajouté cette demande dans votre file d'attente des opérations afin qu'elle soit traitée en temps voulu.