POST多部分/表单
所以这个HTML代码为我提供正确格式的数据。
<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>
我已经研究了很多关于如何在iOS上执行multipart / form-data POST的文章，但是没有一篇真正解释如果有正常的参数以及文件上传时该怎么做。
你能帮我用Obj-C发布这个代码吗？
谢谢！
过程如下：
使用userName ， userEmail和userPassword参数创建字典。
NSDictionary *params = @{@"userName" : @"rob",
@"userEmail" : @"rob@email.com",
@"userPassword" : @"password"};
确定图像的路径：
NSString *path = [[NSBundle mainBundle] pathForResource:@"avatar" ofType:@"png"];
创建请求：
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];
这是上面用于构建请求主体的方法：
- (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:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="%@"rnrn", parameterKey] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"%@rn", 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:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="%@"; filename="%@"rn", fieldName, filename] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"Content-Type: %@rnrn", mimetype] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:data];
[httpBody appendData:[@"rn" dataUsingEncoding:NSUTF8StringEncoding]];
}
[httpBody appendData:[[NSString stringWithFormat:@"--%@--rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
return httpBody;
}
以上使用了以下实用方法：
@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]];
}
然后提交请求。 这里有很多很多的选择。
例如，如果使用NSURLSession ，则可以创建NSURLSessionUploadTask ：
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];
或者你可以创建一个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];
上面假设服务器只是返回文本响应。 服务器返回JSON会更好，在这种情况下，您将使用NSJSONSerialization而不是NSString方法initWithData 。
同样，我正在使用上面的NSURLSession的完成块再现，但也可以随意使用更丰富的基于委托的再现。 但这似乎超出了这个问题的范围，所以我会把它留给你。
但希望这可以说明这个想法。
如果我没有指出这一点，我会失去工作，比上述更容易，你可以使用AFNetworking，重复上面的步骤1和2，但只需调用：
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.");
}
尝试将这个用于不同MIME类型的视频和图像数据。
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];
使用Objective-C使用多部分或表单数据POST多个图像
-(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:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="files"; filename="%@.png"rn",str_image1] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-streamrnrn" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[@"rn" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="name"rnrn"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Nilesh" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"rn" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="apipassword"rnrn"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:app.password] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"rn" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="adminId"rnrn"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:app.adminId] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"rn" dataUsingEncoding:NSUTF8StringEncoding]];
// close form
[body appendData:[[NSString stringWithFormat:@"--%@--rn", 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);
}
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