POST multipart / form-data with Objective-C
ainsi ce code HTML soumet les données dans le format correct pour moi.
<form action="https://www.example.com/register.php" method="post" enctype="multipart/form-data">
Name: <input type="text" name="userName"><BR />
Email: <input type="text" name="userEmail"><BR />
Password: <input type="text" name="userPassword"><BR />
Avatar: <input type="file" name="avatar"><BR />
<input type="submit">
</form>
j'ai regardé dans un bon nombre d'articles sur la façon de faire un multipart/form-data POST sur iOS, mais aucun n'explique vraiment ce qu'il faut faire s'il y avait des paramètres normaux aussi bien que le téléchargement de fichier.
pourriez-vous s'il vous plaît m'aider avec le code pour poster ceci dans Obj-C?
Merci!
4 réponses
le procédé est le suivant:
-
Créer un dictionnaire avec le
userName
,userEmail
, etuserPassword
paramètres".NSDictionary *params = @{@"userName" : @"rob", @"userEmail" : @"rob@email.com", @"userPassword" : @"password"};
-
déterminer le chemin de l'image:
NSString *path = [[NSBundle mainBundle] pathForResource:@"avatar" ofType:@"png"];
-
créer la demande:
NSString *boundary = [self generateBoundaryString]; // configure the request NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url]; [request setHTTPMethod:@"POST"]; // set content type NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [request setValue:contentType forHTTPHeaderField: @"Content-Type"]; // create body NSData *httpBody = [self createBodyWithBoundary:boundary parameters:params paths:@[path] fieldName:fieldName];
-
C'est la méthode utilisée ci-dessus pour construire le corps de la requête:
- (NSData *)createBodyWithBoundary:(NSString *)boundary parameters:(NSDictionary *)parameters paths:(NSArray *)paths fieldName:(NSString *)fieldName { NSMutableData *httpBody = [NSMutableData data]; // add params (all params are strings) [parameters enumerateKeysAndObjectsUsingBlock:^(NSString *parameterKey, NSString *parameterValue, BOOL *stop) { [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", parameterKey] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"%@\r\n", parameterValue] dataUsingEncoding:NSUTF8StringEncoding]]; }]; // add image data for (NSString *path in paths) { NSString *filename = [path lastPathComponent]; NSData *data = [NSData dataWithContentsOfFile:path]; NSString *mimetype = [self mimeTypeForPath:path]; [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", fieldName, filename] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", mimetype] dataUsingEncoding:NSUTF8StringEncoding]]; [httpBody appendData:data]; [httpBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; } [httpBody appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; return httpBody; }
-
ce qui précède utilise les méthodes d'utilité suivantes:
@import MobileCoreServices; // only needed in iOS - (NSString *)mimeTypeForPath:(NSString *)path { // get a mime type for an extension using MobileCoreServices.framework CFStringRef extension = (__bridge CFStringRef)[path pathExtension]; CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, extension, NULL); assert(UTI != NULL); NSString *mimetype = CFBridgingRelease(UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType)); assert(mimetype != NULL); CFRelease(UTI); return mimetype; } - (NSString *)generateBoundaryString { return [NSString stringWithFormat:@"Boundary-%@", [[NSUUID UUID] UUIDString]]; }
-
soumettre ensuite la demande. Il y a beaucoup, beaucoup d'options ici.
par exemple, si vous utilisez
NSURLSession
, vous pouvez créerNSURLSessionUploadTask
:NSURLSession *session = [NSURLSession sharedSession]; // use sharedSession or create your own NSURLSessionTask *task = [session uploadTaskWithRequest:request fromData:httpBody completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { if (error) { NSLog(@"error = %@", error); return; } NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"result = %@", result); }]; [task resume];
ou vous pouvez créer un
NSURLSessionDataTask
:request.HTTPBody = httpBody; NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { if (error) { NSLog(@"error = %@", error); return; } NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"result = %@", result); }]; [task resume];
le ci-dessus suppose que le serveur retourne juste la réponse du texte. Il est préférable que le serveur renvoie JSON, auquel cas vous utiliserez
NSJSONSerialization
plutôt queNSString
méthodeinitWithData
.de même, j'utilise les rendus de bloc d'achèvement de
NSURLSession
ci-dessus, mais n'hésitez pas à utiliser les rendus basés sur les délégués plus riches, aussi. Mais cela semble au-delà de la portée de cette question, donc je vous laisse faire.
Mais espérons que cela illustre l'idée.
je serais négligent si je n'avais pas pointé que, beaucoup plus facile que le ci-dessus, vous pouvez utiliser AFNetworking , en répétant les étapes 1 et 2 ci-dessus, mais en appelant juste:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer]; // only needed if the server is not returning JSON; if web service returns JSON, remove this line
NSURLSessionTask *task = [manager POST:urlString parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
NSError *error;
if (![formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"avatar" fileName:[path lastPathComponent] mimeType:@"image/png" error:&error]) {
NSLog(@"error appending part: %@", error);
}
} progress:nil success:^(NSURLSessionTask *task, id responseObject) {
NSLog(@"responseObject = %@", responseObject);
} failure:^(NSURLSessionTask *task, NSError *error) {
NSLog(@"error = %@", error);
}];
if (!task) {
NSLog(@"Creation of task failed.");
}
AFFICHER plusieurs images à l'aide de plusieurs parties ou de données de formulaire avec Objective-C
-(void)multipleimageandstring
{
NSString *urlString=@"URL NAME";
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"];
// file
float low_bound = 0;
float high_bound =5000;
float rndValue = (((float)arc4random()/0x100000000)*(high_bound-low_bound)+low_bound);//image1
int intRndValue = (int)(rndValue + 0.5);
NSString *str_image1 = [@(intRndValue) stringValue];
UIImage *chosenImage1=[UIImage imageNamed:@"Purchase_GUI_curves-12 copy.png"];
NSData *imageData = UIImageJPEGRepresentation(chosenImage1, 90);
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"files\"; filename=\"%@.png\"\r\n",str_image1] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"name\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Nilesh" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"apipassword\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:app.password] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"adminId\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:app.adminId] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// close form
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// set request body
[request setHTTPBody:body];
//return and test
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"%@", returnString);
}
essayez d'utiliser ceci à la fois pour la vidéo et les données d'image avec différents types de mime.
NSDictionary *param;
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
// 1. Create `AFHTTPRequestSerializer` which will create your request.
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *request;
NSData *fileData;
if ([objDoc.url containsString:@".mp4"]) {
manager.responseSerializer.acceptableContentTypes = [manager.responseSerializer.acceptableContentTypes setByAddingObject:@"application/json"];
[serializer setValue:@"video/mp4" forHTTPHeaderField:@"Content-Type"];
manager.requestSerializer = serializer;
}
// 2. Create an `NSMutableURLRequest`.
NSLog(@"filename =%@",objDoc.url);
request= [serializer multipartFormRequestWithMethod:@"POST" URLString:strUrl parameters:param constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
if ([objDoc.url containsString:@".mp4"]) {
[formData appendPartWithFileData:fileData
name:@"File"
fileName:@"video.mp4"
mimeType:@"video/mp4"];
}else{
[formData appendPartWithFileData:fileData
name:@"File"
fileName:@"image.jpeg"
mimeType:@"image/jpeg"];
}
} error:nil];
// 3. Create and use `AFHTTPRequestOperationManager` to create an `AFHTTPRequestOperation` from the `NSMutableURLRequest` that we just created.
self.objeDocument.isUploading = [NSNumber numberWithInt:1];
self.operation = [manager HTTPRequestOperationWithRequest:request
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"Success %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Error!" message:@"The document attached has failed to upload." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
[self.operation cancel];
NSLog(@"Failure %@", error.description);
}];
// 4. Set the progress block of the operation.
[self.operation setUploadProgressBlock:^(NSUInteger __unused bytesWritten,
long long totalBytesWritten,
long long totalBytesExpectedToWrite) {
NSLog(@"Wrote %lld/%lld", totalBytesWritten, totalBytesExpectedToWrite);
float progress = (float)totalBytesWritten/(float)totalBytesExpectedToWrite;
}];
// 5. Begin!
[self.operation start];
j'ai lutté avec cela pendant un certain temps, si vous cherchez à télécharger des images multiples ou d'autres types de fichiers, vous pouvez faire ce qui suit en utilisant AFNetworking 3.0
NSDictionary *params = @{key : value,
..... etc
};
NSString *urlString = @"http://..... your endpoint url";
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer]; // only needed if the server is not returning JSON;
NSURLSessionTask *task = [manager POST:urlString parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
for (int x = 0 ; x< contentArray.count; x++) {
AttachmentsModel *model = contentArray[x];
if(model.type == ImageAttachmentType){
[formData appendPartWithFileData:model.data name:model.name fileName:model.fileName mimeType:model.mimeType];
}else if(model.type == AudioAttachmentType){
NSURL *urlVideoFile = [NSURL fileURLWithPath:model.path];
[formData appendPartWithFileURL:urlVideoFile name:model.name fileName:model.fileName mimeType:model.mimeType error:nil];
}else{
[formData appendPartWithFileURL:model.url name:model.name fileName:model.fileName mimeType:model.mimeType error:nil];
}
}
} progress:nil success:^(NSURLSessionTask *task, id responseObject) {
[Utility stopLoading];
NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
NSLog(@"result = %@", result);
id json = [NSJSONSerialization JSONObjectWithData:responseObject options:0 error:nil];
if (block) {
//your response comes here
}
} failure:^(NSURLSessionTask *task, NSError *error) {
NSLog(@"error = %@", error);
}];
if (!task) {
NSLog(@"Creation of task failed.");
}
et voici à quoi ressemble mon Modèled'attaches:
// AttachmentsModel.h
typedef enum AttachmnetType{
ImageAttachmentType,
AudioAttachmentType,
VideoAttachmentType
} AttachmnetType;
@interface AttachmentsModel : NSObject
@property (strong, nonatomic) NSString *path;
@property (strong, nonatomic) NSData *data;
@property (strong, nonatomic) NSString *mimeType;
@property (strong, nonatomic) NSString *name;
@property (strong, nonatomic) NSString *fileName;
@property (strong, nonatomic) NSURL *url;