我正在使用asp.net mvc。我正在尝试实现Twitter撰写推文机制文本以及图像,并将其作为推特发送到Twitter。我已按照twitter API 1.1提供的文档进行操作。我已经按照Twitterizer库完成了这个,但它向我抛出了错误,因为虽然我使用的是最新的API版本1,但是它已经被弃用了,除了这个之外它还有其余的端点。所以我决定自己发出http请求
在我的情况下,我在我的表单中有textarea和文件上传控件,如
<form method="post" action="/Home/Upload" enctype="multipart/form-data">
<textarea id="message" name="message"></textarea>
<input type="file" name="file"/>
<input type="submit" value="submit"/>
</form>
之后在我的行动中,我得到了用户选择的图像和他输入我的动作的文字。我已将HttpPostedPostedFileBase转换为byte [],如
[HttpPost]
public ActionResult Upload(FormCollection coll, HttpPostedFileBase upfile)
{
byte[] data;
using (Stream inputStream = upfile.InputStream)
{
MemoryStream memoryStream = inputStream as MemoryStream;
if (memoryStream == null)
{
memoryStream = new MemoryStream();
inputStream.CopyTo(memoryStream);
}
data = memoryStream.ToArray();
}
HttpWebRequest webRequest = WebRequest.Create("https://api.twitter.com/1.1/statuses/update_with_media.json") as HttpWebRequest;
OAuthBase oauth = new OAuthBase();
string nonce = oauth.GenerateNonce();
string timeStamp = oauth.GenerateTimeStamp();
string normalizedUrl;
string normalizedRequestParameters;
string sig = oauth.GenerateSignature
(new System.Uri("https://api.twitter.com/1.1/statuses/update_with_media.json"), consumerKey, consumerSecret, userinfo.AuthToken,
userinfo.PayUserId, "POST", timeStamp, nonce,
OAuthBase.SignatureTypes.HMACSHA1, out normalizedUrl,
out normalizedRequestParameters);
string header = string.Format(@"OAuth oauth_consumer_key=""{0}"",oauth_signature_method=""{1}"",oauth_timestamp=""{2}"",oauth_nonce=""{3}"",oauth_version=""{4}"",oauth_token=""{5}"",oauth_signature=""{6}""",
HttpUtility.UrlEncode(consumerKey), HttpUtility.UrlEncode("HMAC-SHA1"), HttpUtility.UrlEncode(timeStamp), HttpUtility.UrlEncode(nonce), HttpUtility.UrlEncode("1.0"), HttpUtility.UrlEncode(userinfo.AuthToken), HttpUtility.UrlEncode(sig));
webRequest.Headers.Add("Authorization", header);
webRequest.Method = "POST";
webRequest.Credentials = CredentialCache.DefaultCredentials;
((HttpWebRequest)webRequest).UserAgent = ".NET Framework Example Client";
Dictionary<string, object> fieldsToInclude = new Dictionary<string, object>();
fieldsToInclude.Add("status", coll["new_message"]);
fieldsToInclude.Add("media[]", data);
string boundary = Guid.NewGuid().ToString().Replace("-", "");
string dataBoundary = "--------------------r4nd0m";
string contentType = "multipart/form-data; boundary=" + dataBoundary;
byte[] mydata = GetMultipartFormData(fieldsToInclude, contentType);
webRequest.ContentLength = mydata.Length;
webRequest.ContentType = contentType;
using (Stream requestStream = webRequest.GetRequestStream())
{
if (mydata != null)
{
requestStream.Write(mydata, 0, mydata.Length);
}
}
using (HttpWebResponse webResponse = webRequest.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(webResponse.GetResponseStream());
string retVal = reader.ReadToEnd();
}
return View();
}
这里我写了一个为图像和文本数据准备mutipart formdata结构的方法,如
private byte[] GetMultipartFormData(Dictionary<string, object> fieldsToInclude, string boundary)
{
Stream formDataStream = new MemoryStream();
Encoding encoding = Encoding.UTF8;
foreach (KeyValuePair<string, object> kvp in fieldsToInclude)
{
if (kvp.Value.GetType() == typeof(byte[]))
{ //assume this to be a byte stream
byte[] data = (byte[])kvp.Value;
string header = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"{1}\"; filename=\"{2}\";\r\nContent-Type: application/octet-stream\r\n\r\n",
boundary,
kvp.Key,
kvp.Key);
byte[] headerBytes = encoding.GetBytes(header);
formDataStream.Write(headerBytes, 0, headerBytes.Length);
formDataStream.Write(data, 0, data.Length);
}
else
{ //this is normal text data
string header = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"{1}\"\r\n\r\n{2}\r\n",
boundary,
kvp.Key,
kvp.Value);
byte[] headerBytes = encoding.GetBytes(header);
formDataStream.Write(headerBytes, 0, headerBytes.Length);
}
}
string footer = string.Format("\r\n--{0}--\r\n", boundary);
formDataStream.Write(encoding.GetBytes(footer), 0, footer.Length);
formDataStream.Position = 0;
byte[] returndata = new byte[formDataStream.Length];
formDataStream.Read(returndata, 0, returndata.Length);
formDataStream.Close();
return returndata;
}
这就是我跟踪制作http请求以将图片上传到twitter(a.k.a上传媒体)的方式。但我收到错误 500内部服务器错误。如果我的手术出错了,请指导我。
答案 0 :(得分:0)
您可以使用TweetWithMedia方法在LINQ to Twitter中执行此操作,如下所示:
static void TweetWithMediaDemo(TwitterContext twitterCtx)
{
string status = "Testing TweetWithMedia #Linq2Twitter " + DateTime.Now.ToString(CultureInfo.InvariantCulture);
const bool possiblySensitive = false;
const decimal latitude = StatusExtensions.NoCoordinate; //37.78215m;
const decimal longitude = StatusExtensions.NoCoordinate; // -122.40060m;
const bool displayCoordinates = false;
const string replaceThisWithYourImageLocation = @"..\..\images\200xColor_2.png";
var mediaItems =
new List<Media>
{
new Media
{
Data = Utilities.GetFileBytes(replaceThisWithYourImageLocation),
FileName = "200xColor_2.png",
ContentType = MediaContentType.Png
}
};
Status tweet = twitterCtx.TweetWithMedia(
status, possiblySensitive, latitude, longitude,
null, displayCoordinates, mediaItems, null);
Console.WriteLine("Media item sent - Tweet Text: " + tweet.Text);
}
答案 1 :(得分:0)
最后我找到了方法,即Twitterizer类库中存在的问题。众所周知,Twitter API弃用了Twitter API 1.0,因此Twitterizer库根据Twitter API 1.1更新了所有twitter api端点,但它没有更新update_status_media端点。所以我无法使用它。我从github获得了Twitterizer2库源代码。我已经检查了update_status_media端点方法并修复了该问题。需要在
中进行更改Twitterizer2 / Methods / Tweets / UpdateWithmediaCommand.cs文件第87行 更改行 this.OptionalProperties.APIBaseAddress =“https://upload.twitter.com/1/”; this.OptionalProperties.APIBaseAddress =“https://api.twitter.com/1.1/”; 此行。 这很好用。在这里,我看到来自Twitter API 1.1文档的行,
重要提示:在API v1.1中,您现在使用api.twitter.com作为域而不是upload.twitter.com。我们强烈建议您使用此方法使用SSL。
希望这些信息对所有人都有帮助。
答案 2 :(得分:0)
我们可以通过将图像作为流传递来与SendTweetWithMedia()方法共享图像。为了将图像作为流发送,我们需要将其转换。
private void sharetwitter ()
{
var oauth_consumer_key = "your API key";
var oauth_consumer_secret = "Your API secret key";
string token = "access token";
string tokenSecret = "access token secret ";
var post = db.Posts.Where(p => p.PostId ==id).FirstOrDefault();
StringBuilder str = new StringBuilder();
str.AppendLine(post.Title.Trim());
str.AppendLine("learn .net a lot of helpful programming stuffs.");
var service = new TweetSharp.TwitterService(oauth_consumer_key,oauth_consumer_secret);
service.AuthenticateWith(token, tokenSecret);
string url = "http://www.infinetsoft.com/Images/logoinfi.png";
service.SendTweetWithMedia(new SendTweetWithMediaOptions
{
Status = str.ToString(),
Images = new Dictionary<string, Stream> { { "infinetsoft", urltostream(url) } }
});
TempData["SuccessMessage"] = "tweeted success";
}
在这里,我找到了解决方案以获取更多详细信息http://www.infinetsoft.com/Post/How-to-share-image-to-twitter-post-using-asp-net-MVC/1236#.V0Lj1DV97cs
答案 3 :(得分:0)
我是Tweetinvi的开发者。 上传就像这样简单:
urldecode()
我认为这可以为你节省很多时间。
Tweetinvi上传文档:https://github.com/linvi/tweetinvi/wiki/Upload