Question

我肯定想念一些很明显的东西，但是我不知道是什么。我有一个DoLoginAsync像这样：

private async Task DoLoginAsync(bool force = false)
        {
            try
            {
                if (client.Cookies.ContainsKey("user_credentials") && !force)
                {
                    return;
                }
                var html = client.Request("login").GetStringAsync().Result;
                var doc = new HtmlDocument();
                doc.LoadHtml(html);
                var csrf_token = doc.DocumentNode.SelectNodes("//meta[@name='csrf-token']").First().GetAttributeValue("content", string.Empty);
                var values = new Dictionary<string, string>
                {
                    { "user_session[email]", user },
                    { "user_session[password]", password },
                    { "authenticity_token", csrf_token }
                };
                var result = await client.Request("user_session").PostUrlEncodedAsync(values);
            }
            catch (Exception e)
            {
            }

当我在具有catch子句中的断点的测试中运行此代码时，会出现异常

Call failed with status code 404 (Not Found): GET http://www.whatever.com/user_session

WTF？我期望PostUrlEncodedAsync执行POST，而不是GET。有人知道为什么会发生这种情况吗？

Flurl客户端实例化为client = new FlurlClient(BASE_URL).EnableCookies();

更新

尝试了以下测试，但由于相同的异常而失败

[TestMethod]
        public async Task TheTest()
        {
            var message = "";
            try
            {
                var client = new FlurlClient("http://www.slimmemeterportal.nl/").EnableCookies();
                var html = await client.Request("login").GetStringAsync();
                var doc = new HtmlDocument();
                doc.LoadHtml(html);
                var csrf_token = doc.DocumentNode.SelectNodes("//meta[@name='csrf-token']").First().GetAttributeValue("content", string.Empty);
                var values = new Dictionary<string, string>
                {
                    { "user_session[email]", "******" },
                    { "user_session[password]", "******" },
                    { "commit", "inloggen" }, // Not sure if this is actually needed, but it is in the website's request parameters.
                    { "authenticity_token", csrf_token }
                };
                var result = await client.Request("user_session").PostUrlEncodedAsync(values);
            }
            catch (FlurlHttpException ex)
            {
                message = ex.Message;
            }
            Assert.AreEqual("Call failed with status code 404 (Not Found): POST http://www.slimmemeterportal.nl/user_session", message);
        }

Answer 1

神秘的问题解决了：事实证明，在使用Wireshark进行一些调试之后，网站返回了HTTP状态代码301。如here所述，默认操作是使用GET在响应的位置标头中跟踪URI，即使原始请求是POST。

Flurl PostUrlEncoded执行GET而不是POST

1 个答案: