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我正在開發一個Web服務，並且正在編寫一個註冊/登錄API。當我嘗試在iOS模擬器中註冊時，我得到「預期的內容類型文本/ json獲得了text/html。」我花了幾個小時嘗試調試並發現問題，但沒有看到爲什麼我沒有獲取JSON數據。預期的內容類型text/json得到文本/ html
API.h
#import "AFHTTPClient.h"
#import "AFNetworking.h"
typedef void (^JSONResponseBlock)(NSDictionary* json);
@interface API : AFHTTPClient
@property (strong, nonatomic) NSDictionary *user;
+ (API *)sharedInstance;
//check whether there's an authorized user
-(BOOL)isAuthorized;
//send an API command to the server
-(void)commandWithParams:(NSMutableDictionary*)params onCompletion:(JSONResponseBlock)completionBlock;
@end
API.m
#import "API.h"
#define kAPIHost @"http://localhost"
#define kAPIPath @"/api/"
@implementation API
@synthesize user;
+(API*)sharedInstance
{
static API *sharedInstance = nil;
static dispatch_once_t oncePredicate;
dispatch_once(&oncePredicate, ^{
sharedInstance = [[self alloc] initWithBaseURL:[NSURL URLWithString:kAPIHost]];
});
return sharedInstance;
}
-(API*)init
{
//call super init
self = [super init];
if (self != nil) {
//initialize the object
user = nil;
[self registerHTTPOperationClass:[AFJSONRequestOperation class]];
// Accept HTTP Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1
[self setDefaultHeader:@"Accept" value:@"application/json"];
}
return self;
}
-(BOOL)isAuthorized
{
return [[user objectForKey:@"user_id"] intValue]>0;
}
-(void)commandWithParams:(NSMutableDictionary*)params onCompletion:(JSONResponseBlock)completionBlock
{
NSMutableURLRequest *apiRequest =
[self multipartFormRequestWithMethod:@"POST"
path:@"http://localhost/api/index.php"
parameters:params
constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
//TODO: attach file if needed
}];
AFJSONRequestOperation* operation = [[AFJSONRequestOperation alloc] initWithRequest: apiRequest];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
//success!
completionBlock(responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
//failure :(
completionBlock([NSDictionary dictionaryWithObject:[error localizedDescription] forKey:@"error"]);
}];
[operation start];
}
@end
的index.php
<?
session_start();
require("lib.php");
header("Content-Type:application/json");
switch ($_POST['command'])
{
case "login":
login($_POST['username'],$_POST['password']);
break;
case "register";
register($_POST['username'],$_POST['password']);
break;
}
lib.php
<?php
$link = mysqli_connect("localhost","root","root");
mysqli_select_db($link,"test");
header("Content-Type:application/json");
function errorJson($msg){
print json_encode(array('error'=>$msg));
exit();
}
function register($user, $pass) {
//check if username exists in the database (inside the "users" table)
$login = query("SELECT username FROM users WHERE username='%s' limit 1", $user);
if (count($login['result'])>0) {
//the username exists, return error to the iPhone app
errorJson('Username already exists');
}
//try to insert a new row in the "users" table with the given username and password
$result = query("INSERT INTO users(username, password) VALUES('%s','%s')", $user, $pass);
if (!$result['error']) {
//registration is susccessfull, try to also directly login the new user
login($user, $pass);
} else {
//for some database reason the registration is unsuccessfull
errorJson('Registration failed');
}
}
CDRegisterViewController.m
- (IBAction)signUp:(id)sender
{
// form fields validation
if (self.usernameField.text.length < 4 || self.passwordField.text.length < 4){
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Your password is too short" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil];
[alertView show];
}
// salt the password
NSString *saltedPassword = [NSString stringWithFormat:@"%@%@", self.passwordField.text, kSalt];
// prepare hashed storage
NSString *hashedPassword = nil;
unsigned char hashedPasswordData[CC_SHA1_DIGEST_LENGTH];
//hash the pass
NSData *data = [saltedPassword dataUsingEncoding:NSUTF8StringEncoding];
if (CC_SHA1([data bytes], [data length], hashedPasswordData)) {
hashedPassword = [[NSString alloc] initWithBytes:hashedPasswordData length:sizeof(hashedPasswordData) encoding:NSASCIIStringEncoding];
} else {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Password couldn't be sent" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil];
[alertView show];
return;
}
// set the parameters to post
NSString *command = @"register";
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:command, @"command",
self.usernameField.text, @"username", hashedPassword, @"password", nil];
// make the call to the api
[[API sharedInstance] commandWithParams:params onCompletion:^(NSDictionary *json)
{
//result returned
NSDictionary* res = [[json objectForKey:@"result"] objectAtIndex:0];
if ([json objectForKey:@"error"]==nil && [[res objectForKey:@"IdUser"] intValue]>0) {
//success
[[API sharedInstance] setUser: res];
[self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
//show message to the user
[[[UIAlertView alloc] initWithTitle:@"Logged in"
message:[NSString stringWithFormat:@"Welcome %@",[res objectForKey:@"username"] ]
delegate:nil
cancelButtonTitle:@"Close"
otherButtonTitles: nil] show];
} else {
//error
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:[json objectForKey:@"error"] delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil];
[alertView show];
}
}];
}
你的「醃」真的不是因爲每個密碼都使用相同的鹽（kSalt）。 – zaph
@Zaph我跑了查爾斯，這是說它發佈了命令「註冊」，以及用戶名/密碼。當我轉到「響應」選項卡時，它給了我index.php的來源。它是否正確？ – jsmos
我在？>標記之間有一個空格，它現在註冊。謝謝 ：） – jsmos