win10 uwp httpClient 登陆CSDN

电子工程师 2017-11-29 1814

3G技术应用

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描述

我们可以使用下面代码让 HttpClient 使用 Cookie ，有了这个才可以保存登陆，不然登陆成功下次访问网页还是没登陆。

CookieContainer cookies = new CookieContainer(); HttpClientHandlerhandler= new HttpClientHandler();handler.CookieContainer = cookies;HttpClient http = new HttpClient(handler);

虽然已经有Cookie，但是还缺少一些请求需要带的头，因为浏览器是会告诉网站，需要的Accept，为了假装这是一个浏览器，所以就需要添加Accept 和Accept-Encoding Accept-Language User-Agent

添加 Accept

下面的代码可以添加Accept，这里后面的字符串可以自己使用浏览器查看，复制。

http.DefaultRequestHeaders.TryAddWithoutValidation("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");添加 Accept-Encoding http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Encoding","gzip, deflate, br");

如果有 gzip 就需要解压，这个现在不太好弄，建议不要加。

添加 Accept-Language http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Language","zh-CN,zh;q=0.8");添加 User-Agent http.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent","Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");

ContentType

如果设置 ContentType 需要在发送的内容进行添加

content = new StringContent("{"loginName":"lindexi","password":"csdn","autoLogin":false}"){Headers ={ContentType = new MediaTypeHeaderValue("application/json")}}; 发送数据

如果需要使用 Post 或 get 发送数据，那么可以使用HttpContent做出数据，提供的类型有StringContent、FormUrlEncodedContent等。

其中StringContent最简单，而FormUrlEncodedContent可以自动转换。

str= $"username={account.UserName}&password={account.Key}<={lt}&execution={execution}&_eventId=submit";str=str.Replace("@","%40"); HttpContent content =newStringContent(str, Encoding.UTF8);

上面代码就是使用 StringContent 可以看到需要自己转换特殊字符，当然一个好的方法是使用 urlencoding 转换。

如果使用FormUrlEncodedContent就不需要做转换

content=newFormUrlEncodedContent(newList>() {newKeyValuePair("username",account.UserName),newKeyValuePair("password",account.Key),newKeyValuePair("lt",lt),newKeyValuePair("execution",execution),newKeyValuePair("_eventId","submit") });

如果需要上传文件，那么需要使用MultipartFormDataContent

打开 https://passport.csdn.net/account/login 可以看到这个界面

右击查看源代码，可以拿到上传需要使用的两个变量 lt 和 execution

csdn

在登陆的时候，使用 post 把账号密码、lt execution 上传就可以登陆

模拟登陆csdn

于是下面就是模拟登陆

获得账号信息

AccountCimage account = AppId.AccoutCimage;

CookieContainer cookies = new CookieContainer(); HttpClientHandler handler = new HttpClientHandler(); handler.CookieContainer = cookies; HttpClient http = new HttpClient(handler);

获得登陆需要的流水号

var url = new Uri("https://passport.csdn.net/account/login"); http.DefaultRequestHeaders.TryAddWithoutValidation("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"); //http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Encoding", "gzip, deflate, br"); http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Language", "zh-CN,zh;q=0.8"); http.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"); handler.UseCookies = true; handler.AllowAutoRedirect = true; string str = await http.GetStringAsync(url); Regex regex = new Regex(" type="hidden" name="lt" value="([\w|\-]+)""); var lt = regex.Match(str).Groups[1].Value; regex = new Regex("type="hidden" name="execution" value="(\w+)""); var execution = regex.Match(str).Groups[1].Value;

登陆

str = $"username={account.UserName}&password={account.Key}<={lt}&execution={execution}&_eventId=submit"; str = str.Replace("@", "%40"); HttpContent content = new StringContent(str, Encoding.UTF8); str = await content.ReadAsStringAsync(); content=new FormUrlEncodedContent(new List>() { new KeyValuePair("username",account.UserName),//.Replace("@", "%40")), new KeyValuePair("password",account.Key), new KeyValuePair("lt",lt), new KeyValuePair("execution",execution), new KeyValuePair("_eventId","submit") }); str = await content.ReadAsStringAsync(); str = await (await http.PostAsync(url, content)).Content.ReadAsStringAsync();

查看登陆

url = new Uri(““);
str = await http.GetStringAsync(url);

上传文件

content = new MultipartFormDataContent(); ((MultipartFormDataContent)content).Headers.Add("name", "file1"); ((MultipartFormDataContent)content).Headers.Add("filename", "20170114120751.png"); var stream = new StreamContent(await File.OpenStreamForReadAsync()); ((MultipartFormDataContent)content).Add(stream); str = await ((MultipartFormDataContent)content).ReadAsStringAsync(); url = new Uri("http://write.blog.csdn.net/article/UploadImgMarkdown?parenthost=write.blog.csdn.net"); var message = await http.PostAsync(url, content); if (message.StatusCode == HttpStatusCode.OK) { ResponseImage(message); } private async void ResponseImage(HttpResponseMessage message) { using (MemoryStream memoryStream = new MemoryStream()) { int length = 1024; byte[] buffer = new byte[length]; using (GZipStream zip = new GZipStream(await message.Content.ReadAsStreamAsync(), CompressionLevel.Optimal)) { int n; while ((n = zip.Read(buffer, 0, length)) > 0) { memoryStream.Write(buffer, 0, n); } } using (StreamReader stream = new StreamReader(memoryStream)) { string str = stream.ReadToEnd(); } } }
使用 WebView 模拟登陆 csdn

下面给大家一个叫简单方法模拟登陆csdn

GeekWebView.Navigate(newUri("http://passport.csdn.net/")); GeekWebView.NavigationCompleted += OnNavigationCompleted; F =async() => {varfunctionString =string.Format(@"document.getElementsByName('username')[0].value='{0}';","lindexi_gd@163.com");awaitGeekWebView.InvokeScriptAsync("eval",newstring[] { functionString }); functionString =string.Format(@"document.getElementsByName('password')[0].value='{0}';","密码");awaitGeekWebView.InvokeScriptAsync("eval",newstring[] { functionString }); functionString =string.Format(@"document.getElementsByClassName('logging')[0].click();");awaitGeekWebView.InvokeScriptAsync("eval",newstring[] { functionString }); };privateAction F {set;get; }privatevoidOnNavigationCompleted(WebView sender, WebViewNavigationCompletedEventArgs args) { F(); }

当然，这时需要修改登陆信息，我上面写的是我的。如果遇到有验证码，那么这个方法是不可使用，因为输入验证码暂时还没法做。

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