Question

在尝试以下网址请求时尝试从Twitter获得成功回复时遇到问题：https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=username&count=1

我在codeproject.com上找到了一个很棒的例子，它让我可以获得用户的推文，但我希望能够在url字符串中附加一些属性来过滤我收到的推文数量。我使用在没有OAuth的twitter API的1.0版本中执行此操作。当我尝试下面的代码时，我得到WebRequest对象抛出的未经授权的异常。

var oauth_token = "twitterAppData";
var oauth_token_secret = "twitterAppData";
var oauth_consumer_key = "twitterAppData";
var oauth_consumer_secret = "twitterAppData";

// oauth implementation details
var oauth_version = "1.0";
var oauth_signature_method = "HMAC-SHA1";

// unique request details
var oauth_nonce = Convert.ToBase64String(
    new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
var timeSpan = DateTime.UtcNow
    - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();

// message api details
var status = "Updating status via REST API if this works";
var resource_url = "https://api.twitter.com/1.1/statuses/user_timeline.json";
var screen_name = "user1234";
var count = "1";
// create oauth signature
var baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
                "&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&screen_name={6}&count={7}";

var baseString = string.Format(baseFormat,
                            oauth_consumer_key,
                            oauth_nonce,
                            oauth_signature_method,
                            oauth_timestamp,
                            oauth_token,
                            oauth_version,
                             Uri.EscapeDataString(screen_name),
                             Uri.EscapeDataString(count)
                            );

baseString = string.Concat("GET&", Uri.EscapeDataString(resource_url), "&", Uri.EscapeDataString(baseString));

var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
                        "&", Uri.EscapeDataString(oauth_token_secret));

string oauth_signature;
using (HMACSHA1 hasher = new HMACSHA1(ASCIIEncoding.ASCII.GetBytes(compositeKey)))
{
    oauth_signature = Convert.ToBase64String(
        hasher.ComputeHash(ASCIIEncoding.ASCII.GetBytes(baseString)));
}

// create the request header
var headerFormat = "OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", " +
                   "oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", " +
                   "oauth_token=\"{4}\", oauth_signature=\"{5}\", " +
                   "oauth_version=\"{6}\"";

var authHeader = string.Format(headerFormat,
                        Uri.EscapeDataString(oauth_nonce),
                        Uri.EscapeDataString(oauth_signature_method),
                        Uri.EscapeDataString(oauth_timestamp),
                        Uri.EscapeDataString(oauth_consumer_key),
                        Uri.EscapeDataString(oauth_token),
                        Uri.EscapeDataString(oauth_signature),
                        Uri.EscapeDataString(oauth_version)
                );


// make the request

ServicePointManager.Expect100Continue = false;

var postBody = "screen_name=" + Uri.EscapeDataString(screen_name);//
var postbody2 = "count=" + Uri.EscapeDataString(count);
resource_url += "?" + postBody + "&" + postbody2;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(resource_url);
request.Headers.Add("Authorization", authHeader);
request.Method = "GET";
request.ContentType = "application/x-www-form-urlencoded";


WebResponse response = request.GetResponse();
string responseData = new StreamReader(response.GetResponseStream()).ReadToEnd();

如果我取出所有参与＆amp; count = 1

的部分，则上面的代码块有效

请提前感谢您为我提供的任何帮助或指示。

Stuart Turbefield

Answer 1

看起来参数需要在OAUTH签名字符串中按字母顺序排列。我尝试将COUNT切换到开头，它可以工作：

var baseString = string.Format（baseFormat， oauth_consumer_key， oauth_nonce， oauth_signature_method， oauth_timestamp，组oauth_token， oauth_version， Uri.EscapeDataString（SCREEN_NAME） Uri.EscapeDataString（计数））;

祝你好运，多亏了你，我正在寻找1.1 api的例子。

ķ。

C＃Twitter API 1.1 OAuth user_timeline搜索

1 个答案: