Question

因此，当我发送没有任何cookie的请求时，我收到错误。当尝试手动获取请求时（在浏览器中）我首先需要转到主页，该主页加载4个cookie，然后请求可以继续进行而不会出错。一些实验表明我只需要一个饼干。

这对我来说是全新的，欢迎任何有关如何实施这些内容的指南/指南。我知道这个问题很模糊，但我迷失在哪里开始寻找，并希望得到任何帮助

let url = URL(string: "homepage")
        var request = URLRequest(url: url!)
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            guard let data = data, error == nil, let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
                print("response1")
                print("error = \(error)")
                print("response = \(response)")
                return
            }
            if let json = try? JSONSerialization.jsonObject(with: data) {
                print("responseObject = \(json)")
            } else {
                print("response2")
                print("responseString = \(String(data: data, encoding: .utf8))")
            }

            let url2 = URL(string: "requestpage")
            var request = URLRequest(url: url2!)
            request.setValue("application/json", forHTTPHeaderField: "Accept")
            let task = URLSession.shared.dataTask(with: request) { data, response, error in
                guard let data = data, error == nil, let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
                    print("response2")
                    print("error = \(error)")
                    print("response = \(response)")
                    return
                }
                if let json = try? JSONSerialization.jsonObject(with: data) {
                    print("responseObject = \(json)")
                } else {
                    print("response2")
                    print("responseString = \(String(data: data, encoding: .utf8))")
                }
            }
            task.resume()
        }
        task.resume()

Answer 1

在您的代码中，您应该：

为设置Cookie的目标网页启动URLSessionTask;
您将无需干预就会在您的URLSession;
成功收到回复后，您可以发送下一个请求，并且cookie应该自动存在，不需要额外的代码。

除非您做了明确干预此过程的事情，否则URLSession会无缝接收Cookie并将其包含在后续请求中。

如果您正在抓取网站（如果是，请检查ToS以确保其被允许），建议您按照与网络浏览器相同的顺序请求网页。您可能觉得可以绕过该目标网页并自行设置Cookie，但通常会动态生成Cookie值，如果您尝试绕过该目标网页，则可能会遇到问题。

你问了一个例子，并没有多少表现出来。只需从完成第一个请求开始第二个请求。在Swift代码中没有对cookie的单一引用。 URLSession负责一切：

let url = baseURL.appendingPathComponent("setcookie.php")
var request = URLRequest(url: url)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard error == nil, let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
        print("error = \(error)")
        print("response = \(response)")
        return
    }

    let url = baseURL.appendingPathComponent("results.php")
    var request = URLRequest(url: url)
    request.setValue("application/json", forHTTPHeaderField: "Accept")
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil, let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
            print("error = \(error)")
            print("response = \(response)")
            return
        }
        if let json = try? JSONSerialization.jsonObject(with: data) {
            print("responseObject = \(json)")
        } else {
            print("responseString = \(String(data: data, encoding: .utf8))")
        }
    }
    task.resume()
}
task.resume()

我的第一页setcookie，只是设置了一个Cookie：

<?php

setcookie("foo", "bar", time()+3600);

$result = array("success" => true);
echo json_encode($result);

?>

我的第二页检索了cookie：

<?php

$result = array("success" => true);
if (isset($_COOKIE))
    $result["_COOKIE"] = $_COOKIE;

header("Content-Type: application/json");
echo json_encode($result);

?>

以上的Swift代码输出：

responseObject = {
    "_COOKIE" =     {
        foo = bar;
    };
    success = 1;
}

当链接要求cookie在app中运行时该怎么办

1 个答案: