如何搜索鸣叫？ [英] How to search tweets?
本文介绍了如何搜索鸣叫？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我实现OAuth认证，并希望搜索使用下列code鸣叫：
I implemented OAuth authentication and wanted to search for tweets using the following code:
private void searchTweetsWithQuery(string query)
{
var oauth_token = xxx;
var oauth_token_secret = xxx;
var oauth_consumer_key = this.context.ConsumerKey;
var oauth_consumer_secret = this.context.ConsumerSecret;
// 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 resource_url = "https://api.twitter.com/1.1/search/tweets.json";
var screen_name = "nikogamulin";
// 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}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version
);
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_consumer_key=\"{3}\", oauth_nonce=\"{0}\", oauth_signature=\"{5}\", oauth_signature_method=\"{1}\", " +
"oauth_timestamp=\"{2}\", " +
"oauth_token=\"{4}\", " +
"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);//
resource_url += "?q=" + query;
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();
}
在尝试运行code我得到一个异常的request.GetResponse（）：
While trying to run the code I get an exception at request.GetResponse():
The remote server returned an error: (401) Unauthorized.
我试图用同样的code，以获取用户状态（的https： //api.twitter.com/1.1/statuses/user_timeline.json ），它工作得很好。有谁知道是什么原因造成的例外呢？
I tried to use the same code to get user statuses ("https://api.twitter.com/1.1/statuses/user_timeline.json") and it worked fine. Does anyone know what is causing the exception?
我试着运行下面的curl命令，它也运作良好：
I tried to run the following curl command and it also worked well:
curl --get 'https://api.twitter.com/1.1/search/tweets.json' --data 'q=ENGAGE' --header 'Authorization: OAuth oauth_consumer_key="xxx", oauth_nonce="xxx", oauth_signature="xxx", oauth_signature_method="HMAC-SHA1", oauth_timestamp="xxx", oauth_token="xxx", oauth_version="1.0"' --verbose
我试图使等价WebRequest对象，但没有设法成功地运行它。如果可能的话，我也AP preciate如果有人能证明如何使WebRequest对象，这使得同样的要求作为curl命令上面。
I tried to make the equivalent WebRequest object but haven't managed to run it successfully. If possible, I would also appreciate if anyone could show how to make the WebRequest object which makes the same request as above curl command.
感谢您！
推荐答案
问题解决了。原来，参数在基底线的序列是重要的。这是跟其他Twitter API的GET请求。
Solved the problem. It turns out that the sequence of parameters in base string is important. It is the same with other Twitter API GET requests.
这是正确的基本字符串的一个例子：
This is an example of correct base string:
var baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&q={6}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
query
);
而下面的返回401未经授权：
whereas the following returns 401 Unauthorized:
var baseFormat = "q={6}&oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
query
);
下面是它返回的搜索结果的完整的工作方式：
Below is the complete working method which returns search results:
private void searchTweetsWithQuery(string query)
{
var oauth_token = xxx;
var oauth_token_secret = xxx;
var oauth_consumer_key = xxx;
var oauth_consumer_secret = xxx;
// 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";
//working example: https://dev.twitter.com/discussions/12758
var resource_url = "https://api.twitter.com/1.1/search/tweets.json";
var screen_name = "ENGAGEinterreg";
// 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}&q={6}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
query
);
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_consumer_key=\"{3}\", oauth_nonce=\"{0}\", oauth_signature=\"{5}\", oauth_signature_method=\"{1}\", " +
"oauth_timestamp=\"{2}\", " +
"oauth_token=\"{4}\", " +
"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);//
resource_url += "?q=" + query;
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();
}
这篇关于如何搜索鸣叫？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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