2

我一定遗漏了一些非常明显的东西，但我不知道是什么。我有一个DoLoginAsync这样的：

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 catch 子句中带有断点的测试中运行此代码时，我得到一个异常

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

怎么回事？我期待PostUrlEncodedAsync做一个POST，而不是一个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

尝试了以下测试失败并出现相同的异常

[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);
        }
4

1 回答 1

3

谜团解决了：在使用 Wireshark 进行一些调试后，该网站返回 HTTP 状态代码 301。正如这里所解释的，默认操作是使用 GET 跟随响应位置标头中的 URI，即使原始请求是 POST。

于 2018-09-10T17:27:20.307 回答