java - 将 PayPal curl 请求转换为 Java 中的 http 请求

Question

在 PayPal 网站上，所有示例调用都是使用 curl 完成的。在 Linux 下使用 CURL 很容易重复，但我想使用 Java 进行这些调用。

例如，假设有电话:

curl -v https://api.sandbox.paypal.com/v1/payments/payment \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer <Access-Token>' \
-d '{
  "intent":"sale",
  "redirect_urls":{
    "return_url":"http://example.com/your_redirect_url.html",
    "cancel_url":"http://example.com/your_cancel_url.html"
  },
  "payer":{
    "payment_method":"paypal"
  },
  "transactions":[
    {
      "amount":{
        "total":"7.47",
        "currency":"USD"
      }
    }
  ]
}'

假设我有 <Access-Token> 的值必须设置，我如何将之前的字符串转换为 http 请求，以使用 Java 且不使用 CURL 从 PayPal 获得答案？

现在我对 URL 的 HttpURLConnection 做了如下操作:

private HttpURLConnection createPOSTHttpURLConnection(final URL url) throws IOException {
        final HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        connection.setRequestMethod("POST");
        connection.setUseCaches(false);
        connection.setDoInput(true);
        connection.setDoOutput(true);

        connection.setRequestProperty("User-Agent", "Mozilla/4.0");
        return connection;
    }

在我的主要我做如下:

final HttpURLConnection connection = createPOSTHttpURLConnection(url);

connection.setRequestProperty("Authorization", "Bearer <Access-Token>");//replaced with a real value
connection.setRequestProperty("Content-Type", "application/json");
        final String jsonData = "{ \"intent\":\"sale\",  \"redirect_urls\":{    \"return_url\":\"http://example.com/your_redirect_url.html\",    \"cancel_url\":\"http://example.com/your_cancel_url.html\" }, \"payer\":{    \"payment_method\":\"paypal\"  },  \"transactions\":[    {      \"amount\":{        \"total\":\"7.47\",        \"currency\":\"USD\"}}]}";

connection.setFixedLengthStreamingMode(jsonData.length());

// get the output stream to POST to.
try(final DataOutputStream output = new DataOutputStream(connection.getOutputStream())) {
        output.writeBytes(jsonData);
        output.flush();
}

final InputStream isToBeRead =  connection.getInputStream();

但是，我收到以下错误:

Cannot read from the given URL https://api.sandbox.paypal.com/v1/payments/payment with given params and data

当我尝试使用 InputStream 时发生了 Tha :

java.net.HttpRetryException: cannot retry due to server authentication, in streaming mode
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1636)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1439)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at com.sudengut.de.utils.url.HttpClient.readFromHttpURL(HttpClient.java:65)

更新

实现 Kevin Hoffman '解决方案我得到以下结果:

Server returned HTTP response code: 400 for URL: https://api.sandbox.paypal.com/v1/payments/payment
Response code:400
Response message:Bad Request

---

实现 Garry的回答我得到以下日志:

 21:30:06.070 [main] DEBUG o.a.h.c.protocol.RequestAddCookies - CookieSpec selected: default
21:30:06.109 [main] DEBUG o.a.h.c.protocol.RequestAuthCache - Auth cache not set in the context
21:30:06.111 [main] DEBUG o.a.h.i.c.PoolingHttpClientConnectionManager - Connection request: [route: {s}->https://api.sandbox.paypal.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 20]
21:30:06.143 [main] DEBUG o.a.h.i.c.PoolingHttpClientConnectionManager - Connection leased: [id: 0][route: {s}->https://api.sandbox.paypal.com:443][total kept alive: 0; route allocated: 1 of 2; total allocated: 1 of 20]
21:30:06.147 [main] DEBUG o.a.h.impl.execchain.MainClientExec - Opening connection {s}->https://api.sandbox.paypal.com:443
21:30:06.202 [main] DEBUG o.a.h.i.c.DefaultHttpClientConnectionOperator - Connecting to api.sandbox.paypal.com/173.0.82.78:443
21:30:06.202 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory - Connecting socket to api.sandbox.paypal.com/173.0.82.78:443 with timeout 0
21:30:06.668 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory - Enabled protocols: [TLSv1, TLSv1.1, TLSv1.2]
21:30:06.668 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory - Enabled cipher suites:[TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA, SSL_RSA_WITH_RC4_128_SHA, TLS_ECDH_ECDSA_WITH_RC4_128_SHA, TLS_ECDH_RSA_WITH_RC4_128_SHA, SSL_RSA_WITH_RC4_128_MD5, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
21:30:06.669 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory - Starting handshake
21:30:07.291 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory - Secure session established
21:30:07.291 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory -  negotiated protocol: TLSv1.2
21:30:07.292 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory -  negotiated cipher suite: TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
21:30:07.292 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory -  peer principal: CN=api.sandbox.paypal.com, OU=PayPal Production, O="PayPal, Inc.", L=San Jose, ST=California, C=US
21:30:07.292 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory -  peer alternative names: [api.sandbox.paypal.com]
21:30:07.293 [main] DEBUG o.a.h.c.s.SSLConnectionSocketFactory -  issuer principal: CN=VeriSign Class 3 Secure Server CA - G3, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US
21:30:07.306 [main] DEBUG o.a.h.i.c.DefaultHttpClientConnectionOperator - Connection established 192.168.178.22:45213<->173.0.82.78:443
21:30:07.306 [main] DEBUG o.a.h.impl.execchain.MainClientExec - Executing request POST /v1/payments/payment HTTP/1.1
21:30:07.306 [main] DEBUG o.a.h.impl.execchain.MainClientExec - Proxy auth state: UNCHALLENGED
21:30:07.310 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> POST /v1/payments/payment HTTP/1.1
21:30:07.310 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> Content-Type: application/json
21:30:07.310 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> Authorization: Bearer A015TlBaYzfyFSUt9rVin-Lnltn6JuQLA968RyGGC8h.Zds
21:30:07.310 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> Content-Length: 254
21:30:07.311 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> Host: api.sandbox.paypal.com
21:30:07.311 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> Connection: Keep-Alive
21:30:07.311 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> User-Agent: Apache-HttpClient/4.5 (Java/1.8.0_25)
21:30:07.311 [main] DEBUG org.apache.http.headers - http-outgoing-0 >> Accept-Encoding: gzip,deflate
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "POST /v1/payments/payment HTTP/1.1[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "Content-Type: application/json[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "Authorization: Bearer A015TlBaYzfyFSUt9rVin-Lnltn6JuQLA968RyGGC8h.Zds[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "Content-Length: 254[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "Host: api.sandbox.paypal.com[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "Connection: Keep-Alive[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "User-Agent: Apache-HttpClient/4.5 (Java/1.8.0_25)[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "Accept-Encoding: gzip,deflate[\r][\n]"
21:30:07.311 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "[\r][\n]"
21:30:07.312 [main] DEBUG org.apache.http.wire - http-outgoing-0 >> "{ "intent":"sale","redirect_urls":{ "return_url":"http://example.com/your_redirect_url.html", "cancel_url ":"http://example.com/your_cancel_url.html" }, "payer":{"payment_method":"paypal"},"transactions":[{ "amount":{ "total":"7.47", "currency":"USD"}}]}"
21:30:07.663 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "HTTP/1.1 400 Bad Request[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Date: Wed, 29 Jul 2015 19:30:07 GMT[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Server: Apache[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "PROXY_SERVER_INFO: host=slcsbplatformapiserv3001.slc.paypal.com;threadId=205[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Paypal-Debug-Id: 3780624b824ed[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "CORRELATION-ID: 3780624b824ed[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Content-Language: *[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Connection: close[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Connection: close[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Content-Length: 404[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Set-Cookie: X-PP-SILOVER=name%3DSANDBOX3.API.1%26silo_version%3D880%26app%3Dplatformapiserv%26TIME%3D3207182677; domain=.paypal.com; path=/; Secure; HttpOnly[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Set-Cookie: X-PP-SILOVER=; Expires=Thu, 01 Jan 1970 00:00:01 GMT[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Vary: Authorization[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Content-Type: application/json[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "[\r][\n]"
21:30:07.664 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "{"name":"VALIDATION_ERROR","details":[{"field":"redirect_urls.cancel_url ","issue":"This field name is not defined for this resource type"},{"field":"redirect_urls.cancel_url","issue":"This field required when payment_method is 'paypal'"}],"message":"Invalid request - see details","information_link":"https://developer.paypal.com/webapps/developer/docs/api/#VALIDATION_ERROR","debug_id":"3780624b824ed"}"
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << HTTP/1.1 400 Bad Request
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Date: Wed, 29 Jul 2015 19:30:07 GMT
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Server: Apache
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << PROXY_SERVER_INFO: host=slcsbplatformapiserv3001.slc.paypal.com;threadId=205
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Paypal-Debug-Id: 3780624b824ed
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << CORRELATION-ID: 3780624b824ed
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Content-Language: *
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Connection: close
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Connection: close
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Content-Length: 404
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Set-Cookie: X-PP-SILOVER=name%3DSANDBOX3.API.1%26silo_version%3D880%26app%3Dplatformapiserv%26TIME%3D3207182677; domain=.paypal.com; path=/; Secure; HttpOnly
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Set-Cookie: X-PP-SILOVER=; Expires=Thu, 01 Jan 1970 00:00:01 GMT
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Vary: Authorization
21:30:07.669 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Content-Type: application/json
21:30:07.681 [main] DEBUG o.a.h.c.p.ResponseProcessCookies - Cookie accepted [X-PP-SILOVER="name%3DSANDBOX3.API.1%26silo_version%3D880%26app%3Dplatformapiserv%26TIME%3D3207182677", version:0, domain:paypal.com, path:/, expiry:null]
21:30:07.684 [main] WARN  o.a.h.c.p.ResponseProcessCookies - Invalid cookie header: "Set-Cookie: X-PP-SILOVER=; Expires=Thu, 01 Jan 1970 00:00:01 GMT". Invalid 'expires' attribute: Thu, 01 Jan 1970 00:00:01 GMT

如果我用更多信息来解决这个问题，我会看到给定的 cookie 已附加并且不会替换缺少到期日期的 cookie。只需运行:

import java.time.Instant;
import java.time.LocalDate;
import java.time.ZoneId;
import java.time.temporal.ChronoUnit;

import java.util.Date;

import org.apache.http.HttpResponse;
import org.apache.http.client.CookieStore;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.cookie.BasicClientCookie;
import org.apache.http.protocol.HTTP;

public class GarrysSolution {

    public static void main(final String[] args) {

        String accessToken = "A-valid-token";
        String jsonString =
            "{ \"intent\":\"sale\",\"redirect_urls\":{ \"return_url\":\"http://example.com/your_redirect_url.html\", \"cancel_url \":\"http://example.com/your_cancel_url.html\" }, \"payer\":{\"payment_method\":\"paypal\"},\"transactions\":[{ \"amount\":{ \"total\":\"7.47\", \"currency\":\"USD\"}}]}";

        BasicCookieStore cookieStore = new BasicCookieStore();
        BasicClientCookie cookie = new BasicClientCookie("JSESSIONID", "1234");
        cookie.setDomain(".paypal.com");
        cookie.setPath("/");

        LocalDate expirationDate = LocalDate.now().plus(100L, ChronoUnit.DAYS);
        Instant instant = Instant.from(expirationDate.atStartOfDay(ZoneId.of("GMT")));
        cookie.setExpiryDate(Date.from(instant));
        cookie.setCreationDate(Date.from(Instant.now()));
        cookieStore.addCookie(cookie);

        RequestConfig globalConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.NETSCAPE).build();        HttpClientContext context = HttpClientContext.create();
        context.setCookieStore(cookieStore);

        HttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(globalConfig)
                                           .setDefaultCookieStore(cookieStore).build();

        HttpPost httpPost = new HttpPost("https://api.sandbox.paypal.com/v1/payments/payment");
        httpPost.setHeader("Content-Type", "application/json");
        httpPost.setHeader("Authorization", "Bearer " + accessToken);

        StringEntity entity = new StringEntity(jsonString, HTTP.UTF_8);
        entity.setContentType("application/json");
        httpPost.setEntity(entity);
        try {
            HttpResponse httpResponse = httpClient.execute(httpPost, context);

            System.out.println("\n\n" + context.getCookieStore().getCookies());

            System.out.println("\n\n" + httpResponse.getStatusLine().getStatusCode() + "/"
                    + httpResponse.getStatusLine().getReasonPhrase());
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }

    }

}

我们从上下文中看到以下 cookie:

[[version: 0][name: JSESSIONID][value: 1234][domain: .paypal.com][path: /][expiry: Fri Nov 06 01:00:00 CET 2015], [version: 0][name: X-PP-SILOVER][value: name%3DSANDBOX3.API.1%26silo_version%3D880%26app%3Dplatformapiserv%26TIME%3D2370156885][domain: .paypal.com][path: /][expiry: null]]

所以我想这个问题可以通过将到期日期设置为适当的 cookie 来解决

Answer 1

代码吞没了异常(在没有捕获的 try block 中)，该异常被抛出以指示正在发生 HTTP 错误 401(未经授权)。这可能是由于访问 token 无效所致。然后代码尝试读取 HTTP 响应，但失败了(因为 401 错误导致没有响应)并抛出正在打印到屏幕上的异常。

是否有可能在您设置代码时访问 token 已过期？

我获得了以下代码(下方)，可以使用有效的访问 token 成功地使用 PayPal。与您的代码有一些细微差别(没有单独的方法；使用 HttpsURLConnection 而不是 HttpUrlConnection；删除了一些不需要的 header ；等等)，但是这些更改都没有使它单独工作——它们只是稍微收紧了它并确保了它出现问题时打印正确的错误消息。然后，一旦我提供了一个有效的访问 token ，它就成功运行了。我想你知道尖括号 < >必须删除访问 token 周围的内容，否则您将永远不会获得 curl工作方法。

此外，请记住这只是示例代码 - 生产代码应将关闭语句移动到 finally 中 block ，或者返回到您最初使用的尝试资源方法。

import java.io.BufferedReader; 
import java.io.InputStreamReader;
import java.io.DataOutputStream; 
import java.net.URL;             
import javax.net.ssl.HttpsURLConnection;

public class TestHttpsPost {

    public static void main(String[] args) throws Exception {

        // Uncomment one of these next two lines:
        URL url = new URL("https://api.sandbox.paypal.com/v1/payments/payment");
        //URL url = new URL("https://httpbin.org/post"); // good for testing

        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setDoInput(true);
        connection.setDoOutput(true);

        // Change this to a valid token:
        connection.setRequestProperty("Authorization", "Bearer <Access-Token>");
        connection.setRequestProperty("Content-Type", "application/json");
        String jsonData = "{ \"intent\":\"sale\",  \"redirect_urls\":{        \"return_url\":\"http://example.com/your_redirect_url.html\",    \"cancel_url    \":\"http://example.com/your_cancel_url.html\" }, \"payer\":{    \"payment_method\":\"paypal\"  },  \"transactions\":[    {          \"amount\":{        \"total\":\"7.47\",        \"currency\":\"USD\"}}]}";

        try {
            // Post the data:
            DataOutputStream output = new DataOutputStream(connection.getOutputStream());
            output.writeBytes(jsonData);
            output.close();

            // Read the response:
            BufferedReader reader = new BufferedReader(new InputStreamReader(
              connection.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
            reader.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }

        System.out.println("Response code:" + connection.getResponseCode());
        System.out.println("Response message:" + connection.getResponseMessage());
    }
}