Question

我遇到了sharedCredentialStorage的问题。它不会返回预期的凭证，即使保护空间的所有参数（主机，端口......）与我之前设置的相同。

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）的结果给出：

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

这意味着凭证已正确添加到sharedCredentialStorage。

但是当http请求操作发生并且身份验证challange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。你有什么线索为什么会这样？

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，即使我在领域使用某些字符串（并在我的REST Web服务中也正确设置它），它也不起作用。

Answer 1

当您接受挑战时，保护空间中提供的端口可能为80（或443）。当您存储凭据时，您给出的端口为0.将其设置为正确的端口（对于http为80，对于https为443，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？）并试试。

NSURLCredentialStorage sharedCredentialStorage不会返回有效凭据

1 个答案: