使用AFN 的POST请求出现错误"Error Domain=NSCocoaErrorDomain Code=3840 "决绝方案

使用最新版本的AFN 进行HTTP的网络请求偶尔遇到的问题, 有时候自己就解决了, 也不知道原因, 后来 stackOverFlow上看到一个答案试了一下 可以解决 不过他的都是用C 写的, 简单改了一下 还是使用AFN

代码

/* 主要就是给 请求的过程添加一个安全政策的对象 并使用 */
+ (void)POSTWithURL:(NSString *)url withBody:(id)body withBodyStyle:(bodyStyle)bodyStyle withHttpHead:(NSDictionary *)head responseStyle:(responseStyle)style withSuccess:(void (^)(id))success withFail:(void (^)(NSError *))fail {

AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
[securityPolicy setAllowInvalidCertificates:YES];

NSString *url_string = [NSString stringWithString:url];
/* 创建http请求管理者 */
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
/* 处理body类型 */
switch (bodyStyle) {
case stringStyle: {
break;
}
case JSONStyle: {
break;
}
}

/* 添加请求头 */
if (head) {
for (NSString *key in head) {
[manager.requestSerializer setValue:head[key] forHTTPHeaderField:key];
}
}
/* 判断返回数据类型 */
switch (style) {
case DATA: {
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
break;
}
case JSON: {
manager.responseSerializer = [AFJSONResponseSerializer serializer];
break;
}
case XML: {
manager.responseSerializer = [AFXMLParserResponseSerializer serializer];
break;
}

default:
break;
}
/* 设置请求接受的数据类型 */
[manager setSecurityPolicy:securityPolicy];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];

//    [manager.responseSerializer setAcceptableContentTypes:[NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript",@"text/html",@"text/plain", nil]];
//本地缓存设置，沙盒路径设置
NSArray *path = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *pathString = path.lastObject;
NSString *pathLast =[NSString stringWithFormat:@"/Caches/com.hackemist.post.default/%lu.text", (unsigned long)[url_string hash]];

//创建字符串文件存储路径
NSString *PathName =[pathString stringByAppendingString:pathLast];

//第一次进入判断有没有文件夹，如果没有就创建一个
NSString * textPath = [pathString stringByAppendingFormat:@"/Caches/com.hackemist.post.default"];
if (![[NSFileManager defaultManager]fileExistsAtPath:textPath]) {

[[NSFileManager defaultManager]createDirectoryAtPath:textPath withIntermediateDirectories:YES attributes:nil error:nil];
}
//设BOOL值 判断解析后的数据是数组还是字典
__block  BOOL isClass = NO;

/* POST请求 */
[manager POST:url parameters:body constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

} progress:^(NSProgress * _Nonnull uploadProgress) {

} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
if ([responseObject isKindOfClass:[NSArray class]]) {
isClass = YES;
} else{
isClass = NO;
}
[responseObject writeToFile:PathName atomically:YES];
success(responseObject);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
NSString * cachePath = PathName;
if ([[NSFileManager defaultManager] fileExistsAtPath:cachePath]) {
//从本地读缓存文件
id responseObject = nil;
if (isClass) {
responseObject = [NSMutableArray arrayWithContentsOfFile:cachePath];
} else {
responseObject = [NSMutableDictionary dictionaryWithContentsOfFile:cachePath];
}
success(responseObject);
}

}];
}

本篇和之前写过的关于AFN封装的博客挂钩 如果不懂可以参考一下

http://blog.csdn.net/qq_30402119/article/details/49822513主要就是加下面的四句

/* 设置安全政策对象 */
AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
[securityPolicy setAllowInvalidCertificates:YES];
/* 使用 */
[manager setSecurityPolicy:securityPolicy];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];