如何从jenkins工作流程调用REST

我想知道如何从(groovy)Jenkins工作流脚本调用REST API.我可以执行"sh'curl -X POST ...'" - 它可以工作,但是将请求构建为curl命令很麻烦并且处理响应变得复杂.我更喜欢原生的Groovy HTTP客户端在groovy中编程 - 我应该从哪个开始？由于脚本是在Jenkins中运行的,因此可以将所有需要的依赖项jar复制到Jenkins上的groovy安装中,因此可以理解轻量级的内容.

有一个内置的步骤可用于使用Jenkins HTTP Request Plugin来发出http请求.

插件:https://wiki.jenkins-ci.org/display/JENKINS/HTTP+Request+Plugin

步骤文档:https://jenkins.io/doc/pipeline/steps/http_request/#httprequest-perform-an-http-request-and-return-a-response-object

插件github页面的示例:

def response = httpRequest "http://httpbin.org/response-headers?param1=${param1}"
println('Status: '+response.status)
println('Response: '+response.content)

本机Groovy代码,无需导入任何包:

// GET
def get = new URL("https://httpbin.org/get").openConnection();
def getRC = get.getResponseCode();
println(getRC);
if(getRC.equals(200)) {
    println(get.getInputStream().getText());
}


// POST
def post = new URL("https://httpbin.org/post").openConnection();
def message = '{"message":"this is a message"}'
post.setRequestMethod("POST")
post.setDoOutput(true)
post.setRequestProperty("Content-Type", "application/json")
post.getOutputStream().write(message.getBytes("UTF-8"));
def postRC = post.getResponseCode();
println(postRC);
if(postRC.equals(200)) {
    println(post.getInputStream().getText());
}

我在安装HTTPBuilder库时遇到了麻烦,因此我最终使用了更基本的URL类来创建HttpUrlConnection.

HttpResponse doGetHttpRequest(String requestUrl){    
    URL url = new URL(requestUrl);    
    HttpURLConnection connection = url.openConnection();    

    connection.setRequestMethod("GET");    

    //get the request    
    connection.connect();    

    //parse the response    
    HttpResponse resp = new HttpResponse(connection);    

    if(resp.isFailure()){    
        error("\nGET from URL: $requestUrl\n  HTTP Status: $resp.statusCode\n  Message: $resp.message\n  Response Body: $resp.body");    
    }    

    this.printDebug("Request (GET):\n  URL: $requestUrl");    
    this.printDebug("Response:\n  HTTP Status: $resp.statusCode\n  Message: $resp.message\n  Response Body: $resp.body");    

    return resp;    
}  

/**    
 * Posts the json content to the given url and ensures a 200 or 201 status on the response.    
 * If a negative status is returned, an error will be raised and the pipeline will fail.    
 */    
HttpResponse doPostHttpRequestWithJson(String json, String requestUrl){    
    return doHttpRequestWithJson(json, requestUrl, "POST");    
}    

/**    
 * Posts the json content to the given url and ensures a 200 or 201 status on the response.    
 * If a negative status is returned, an error will be raised and the pipeline will fail.    
 */    
HttpResponse doPutHttpRequestWithJson(String json, String requestUrl){    
    return doHttpRequestWithJson(json, requestUrl, "PUT");    
}

/**    
 * Post/Put the json content to the given url and ensures a 200 or 201 status on the response.    
 * If a negative status is returned, an error will be raised and the pipeline will fail.    
 * verb - PUT or POST    
 */    
HttpResponse doHttpRequestWithJson(String json, String requestUrl, String verb){    
    URL url = new URL(requestUrl);    
    HttpURLConnection connection = url.openConnection();    

    connection.setRequestMethod(verb);    
    connection.setRequestProperty("Content-Type", "application/json");    
    connection.doOutput = true;    

    //write the payload to the body of the request    
    def writer = new OutputStreamWriter(connection.outputStream);    
    writer.write(json);    
    writer.flush();    
    writer.close();    

    //post the request    
    connection.connect();    

    //parse the response    
    HttpResponse resp = new HttpResponse(connection);    

    if(resp.isFailure()){    
        error("\n$verb to URL: $requestUrl\n    JSON: $json\n    HTTP Status: $resp.statusCode\n    Message: $resp.message\n    Response Body: $resp.body");    
    }    

    this.printDebug("Request ($verb):\n  URL: $requestUrl\n  JSON: $json");    
    this.printDebug("Response:\n  HTTP Status: $resp.statusCode\n  Message: $resp.message\n  Response Body: $resp.body");    

    return resp;    
}  

class HttpResponse {    

    String body;    
    String message;    
    Integer statusCode;    
    boolean failure = false;    

    public HttpResponse(HttpURLConnection connection){    
        this.statusCode = connection.responseCode;    
        this.message = connection.responseMessage;    

        if(statusCode == 200 || statusCode == 201){    
            this.body = connection.content.text;//this would fail the pipeline if there was a 400    
        }else{    
            this.failure = true;    
            this.body = connection.getErrorStream().text;    
        }    

        connection = null; //set connection to null for good measure, since we are done with it    
    }       
}

然后我可以用以下内容做一个GET: HttpResponse resp = doGetHttpRequest("http://some.url");

和一个带有JSON数据的PUT使用类似的东西: HttpResponse resp = this.doPutHttpRequestWithJson("{\"propA\":\"foo\"}", "http://some.url");