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我对 sharedCredentialStorage 有疑问。它不会返回预期的凭据，即使保护空间的所有参数（主机、端口、...）与我之前设置的参数相同。

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（在 sharedCredentialStorage 中）的结果给出：

(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。

但是当 http 请求操作发生并且身份验证挑战弹出并运行此代码时：

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

没有任何内容返回到凭证变量。你知道为什么会这样吗？

gdb 的输出给出：

(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，即使我使用一些字符串作为领域（并在我的 REST Web 服务中正确设置它）它也不起作用。

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1 回答 1

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当您收到挑战时，保护空间中提供的端口可能是 80（或 443）。当您存储凭据时，您提供的端口为 0。将其设置为正确的端口（80 用于 http，443 用于 https，除非您知道要连接的服务器未使用默认端口 - 您的 lldv 输出似乎显示端口 50？）并尝试一下。

于 2013-01-23T07:41:18.647 回答