'identity.api.rackspacecloud.com' 随机抛出 'The remote name could not be resolved' 异常
'identity.api.rackspacecloud.com' randomly throws 'The remote name could not be resolved' exception
我正在访问 Rackspace 云 API。
我有一个 api 调用可以在 rackspace 云上验证我的身份。
该方法非常有效,但是,我有时会收到此异常,随机 :
The remote name could not be resolved: 'identity.api.rackspacecloud.com'
当我没有得到这个异常时,方法 returns 预期的结果,因为它应该是。
这样做有什么具体原因吗?
这是我的 .net
代码:
private async Task<XDocument> AuthenticateAsync()
{
XNamespace ns = "http://docs.rackspace.com/identity/api/ext/RAX-KSKEY/v1.0";
XDocument doc =
new XDocument(
new XDeclaration("1.0", "UTF-8", "Yes"),
new XElement("auth",
new XElement(ns + "apiKeyCredentials",
new XAttribute("username", "the userName"),
new XAttribute("apiKey", "the apiKey")
)
)
);
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));
StringContent content = new StringContent(doc.ToString(), Encoding.UTF8, "application/xml");
// i randomly get "The remote name could not be resolved" exception
HttpResponseMessage response = await client.PostAsync("https://identity.api.rackspacecloud.com/v2.0/tokens", content);
response.EnsureSuccessStatusCode();
string stringResponse = await response.Content.ReadAsStringAsync();
return XDocument.Parse(stringResponse);
}
}
这听起来确实像是 DNS 故障。你能配置你的机器使用 Google DNS servers 然后再试一次吗?
我正在访问 Rackspace 云 API。
我有一个 api 调用可以在 rackspace 云上验证我的身份。
该方法非常有效,但是,我有时会收到此异常,随机 :
The remote name could not be resolved: 'identity.api.rackspacecloud.com'
当我没有得到这个异常时,方法 returns 预期的结果,因为它应该是。
这样做有什么具体原因吗?
这是我的 .net
代码:
private async Task<XDocument> AuthenticateAsync()
{
XNamespace ns = "http://docs.rackspace.com/identity/api/ext/RAX-KSKEY/v1.0";
XDocument doc =
new XDocument(
new XDeclaration("1.0", "UTF-8", "Yes"),
new XElement("auth",
new XElement(ns + "apiKeyCredentials",
new XAttribute("username", "the userName"),
new XAttribute("apiKey", "the apiKey")
)
)
);
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));
StringContent content = new StringContent(doc.ToString(), Encoding.UTF8, "application/xml");
// i randomly get "The remote name could not be resolved" exception
HttpResponseMessage response = await client.PostAsync("https://identity.api.rackspacecloud.com/v2.0/tokens", content);
response.EnsureSuccessStatusCode();
string stringResponse = await response.Content.ReadAsStringAsync();
return XDocument.Parse(stringResponse);
}
}
这听起来确实像是 DNS 故障。你能配置你的机器使用 Google DNS servers 然后再试一次吗?