NSURLCredentialStorage sharedCredentialStorage不返回有效的凭据

Question

我对sharedCredentialStorage有点问题。它不会返回预期的凭据，即使拥有保护空间的所有参数(主机、端口...)和我之前设置的一样。

设置defaultCredential的代码：

NSURLCredential* credential = [NSURLCredential credentialWithUser:[self.username text] password:[self.password text] persistence:NSURLCredentialPersistencePermanent];
NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]initWithHost:@"localhost" port:0 protocol:NSURLProtectionSpaceHTTP realm:nil authenticationMethod:NSURLAuthenticationMethodDefault];
[[NSURLCredentialStorage sharedCredentialStorage] setDefaultCredential:credential forProtectionSpace:protectionSpace];

运行这段代码并转到gdb窗口后，allCredentials (位于sharedCredentialStorage)的结果如下：

(lldb) po [[NSURLCredentialStorage sharedCredentialStorage] allCredentials]
(id) $10 = 0x07546d60 {
    "<NSURLProtectionSpace: 0x7550530>" =     {
        lauro = "<NSURLCredential: 0x7573490>: lauro";
    };
}

这意味着凭据已正确添加到sharedCredentialStorage。

但当http请求操作发生时，弹出身份验证challange，并运行以下代码：

credential = [[NSURLCredentialStorage sharedCredentialStorage] defaultCredentialForProtectionSpace:[challenge protectionSpace]];

不会向凭据变量返回任何内容。你知道为什么会发生这种事吗？

gdb的输出结果如下：

(lldb) po [[[[NSURLCredentialStorage sharedCredentialStorage] allCredentials] allKeys] objectAtIndex:0]
(id) $13 = 0x0754c1b0 <NSURLProtectionSpace: 0x754c1b0>
(lldb) po [[[[[NSURLCredentialStorage sharedCredentialStorage] allCredentials] allKeys] objectAtIndex:0] host]
// Host for the credential @ sharedCredentialStorage
(id) $14 = 0x0a8b8000 localhost
(lldb) po [[[[[NSURLCredentialStorage sharedCredentialStorage] allCredentials] allKeys] objectAtIndex:0] port]
// Port for the credential @ sharedCredentialStorage (0 matches any)
(id) $15 = 0x00000000 <nil>
(lldb) po [[[[[NSURLCredentialStorage sharedCredentialStorage] allCredentials] allKeys] objectAtIndex:0] realm]
// Realm for the credential @ sharedCredentialStorage (nil matches any)
(id) $16 = 0x00000000 <nil>
(lldb) po [[[[[NSURLCredentialStorage sharedCredentialStorage] allCredentials] allKeys] objectAtIndex:0] authenticationMethod]
// Authentication method for the credential @ sharedCredentialStorage (this gets converted to HTTP basic)
(id) $17 = 0x0159c094 NSURLAuthenticationMethodDefault
(lldb) po [[[[[NSURLCredentialStorage sharedCredentialStorage] allCredentials] allKeys] objectAtIndex:0] protocol]
// Protocol for the credential @ sharedCredentialStorage
(id) $18 = 0x0159b504 http
(lldb) po [[challenge protectionSpace] host]
// Host for the credential @ challange
(id) $19 = 0x0754e6c0 localhost
(lldb) po [[challenge protectionSpace] port]
// Port for the credential @ challange
(id) $20 = 0x00000050 [no Objective-C description available]
// Realm for the credential @ challange
(lldb) po [[challenge protectionSpace] realm]
(id) $21 = 0x01bde844 <object returned empty description>
// Authentication method for the credential @ challange
(lldb) po [[challenge protectionSpace] authenticationMethod]
(id) $22 = 0x0159c094 NSURLAuthenticationMethodDefault

// And finally, the check again to see if we have credentials @ sharedCredentialStorage
(lldb) po [[NSURLCredentialStorage sharedCredentialStorage] allCredentials]
(id) $25 = 0x0756f2b0 {
    "<NSURLProtectionSpace: 0x7574a80>" =     {
        lauro = "<NSURLCredential: 0x7574b00>: lauro";
    };
}

还有一件事，即使我为realm使用了一些字符串(并在我的REST web服务中正确地设置了它)，它也不能工作。

Answer 1

当您收到质询时，保护空间中提供的端口可能是80 (或443)。当您存储凭据时，您指定的端口为0。将其设置为正确的端口( http为80，https为443，除非您知道您连接的服务器没有使用默认端口-您的lldv输出似乎显示端口50?)试一试。