使用LR編寫HTTP協議Json報文格式接口腳本實戰

最近在做HTTP協議接口壓測時，遇到一些編寫腳本方面的問題，在這里總結記錄下，以便以后溫習，也希望能幫助到和我有同樣困惑的朋友吧。

//實戰代碼如下所示：
Action()
{
   lr_start_transaction("事物");

// 斷言內容：processcode":"0000","processdes:"處理成功"

   web_reg_save_param("processcode",
                      "NotFound=warning",
                      "LB=processcode\":\"",
                      "RB=\",\"processdes",
                      "Ord=1",
                      "Search=Body",
                      LAST);

  web_reg_save_param("processdes",
                  "NotFound=warning",
                  "LB=processdes\":\"",
                  "RB=\",\"checkresult",
                  "Ord=1",
                  "Search=Body",
                  LAST);

   //接口1：發送指定key:value參數的json報文
    web_submit_data("request",
                   "Action=http://IP:port/sss/idCardCheck11",
                   "Method=POST",
                   "Mode=HTTP",
                   "RecContentType=application/json",
                    ITEMDATA,
                    "Name=msgbody", "Value={\"app_sign\":\"287cca63e9316c031\",\"businesscode\":\"05\"," 
                    "\"note\":\"\",\"brnchcd\":\"4001\",\"b64pic\":\"\",\"inputtype\":\"11\",\"teller\":\"2666\"," 
                    "\"idcardno\":\"139891119211X\",\"name\":\"user\",\"wthrespic\":\"1\",\"app_id\":null," 
                    "\"bankcode\":\"31100396\",\"timestamp\":\"1536118078193\"}", ENDITEM,
                    LAST);                    
    //接口2：發送json格式報文
    web_custom_request("request",
                  "Url=http://IP:port/sss/idCardCheck11",
                  "Method=POST",
                  "Mode=HTTP",
                  "EncType=application/json",
                  "RecContentType=application/json",
                  "Body={\"app_sign\":\"287cca63e9316c031\",\"businesscode\":\"05\",\"note\":\"\",\"brnchcd\":\"4001\"," 
                  "\"b64pic\":\"\",\"inputtype\":\"11\",\"teller\":\"2666\",\"idcardno\":\"139891119211X\","\"name\":" 
                  "\"user\",\"wthrespic\":\"1\",\"app_id\":null,\"bankcode\":\"31100396\",\"timestamp\":\"1536118078193\"}",
                   LAST);

     //響應報文key值和預期結果比較，如果等於0則請求處理成功
     if(strcmp(lr_eval_string("{processcode}"),"0000") == 0){
        lr_end_transaction("事物", LR_PASS);

     }else{
        lr_end_transaction("事物", LR_FAIL);
        //事物失敗后打印processdes字段的值，也就是錯誤信息，但是LR打印出來的中文出現亂碼，所以這里做了轉碼的操作
        lr_convert_string_encoding(lr_eval_string("{processdes}"),LR_ENC_UTF8,LR_ENC_SYSTEM_LOCALE,"resultMsg");
        //解碼后返回單筆核對請求處理成功
        lr_error_message("錯誤信息:%s",lr_eval_string("{resultMsg}"));  

    }

  // lr_end_transaction("事物",LR_AUTO);

    return 0;
}

以下是web_submit_data()函數 API示例代碼：

從示例可以看到發送的是name,value對，提交表單的形式，但實際Value值也可能存在json數組，xml等形式。

  // web_submit_data() API示例
  web_submit_data("default.aspx",
                "Action=http://lazarus/flightnet/default.aspx",
                "Method=POST",
                "TargetFrame=",
                "RecContentType=text/html",
                "Referer=http://lazarus/flightnet/",
                "Snapshot=t7.inf",
                "Mode=HTML",
                ITEMDATA,
                "Name=grpType", "Value=radRoundtrip", ENDITEM,
                "Name=lstDepartingCity", "Value=DEN", ENDITEM,
                "Name=lstDestinationCity", "Value=LAX", ENDITEM,
                "Name=btnAvailableFlights", "Value=Next >", ENDITEM,
            LAST );

接口請求報文如下：

msgbody:{app_sign:287cca63e9316c031,businesscode:05,note:,brnchcd:4001,b64pic:,inputtype:11,teller:2666,idcardno:139891119211X,name:user,wthrespic:1,app_id:null,bankcode:31100396,timestamp:1536118078193}

問題描述：

往常使用LR編寫處理HTTP接口腳本，慣用的函數是web自定義請求函數 web_custom_request（），使用接口測試工具postman請求成功后就直接編寫腳本，嘗試了幾種組body的方法均返回請求方法格式出錯或者直接請求失敗，嘗試請求方法如下所示：

  web_custom_request("request",
                  "Url=http://10.148.0.161:1111/check/idCardCheck",
                  "Method=POST",
                  "Mode=HTTP",
                  "EncType=application/json",
                  "RecContentType=application/json",
                  "Body={msgbody:{\"app_sign\":\"287cca63e9316c031\",\"businesscode\":\"05\",\"note\":\"\",\"brnchcd\":\"4001\"," 
                  "\"b64pic\":\"\",\"inputtype\":\"11\",\"teller\":\"2666\",\"idcardno\":\"139891119211X\","\"name\":" 
                  "\"user\",\"wthrespic\":\"1\",\"app_id\":null,\"bankcode\":\"31100396\",\"timestamp\":\"1536118078193\"}}",
                   LAST);
      
      web_custom_request("request",
                  "Url=http://10.148.0.161:1111/check/idCardCheck",
                  "Method=POST",
                  "Mode=HTTP",
                  "EncType=application/json",
                  "RecContentType=application/json",
                  "Body={\"msgbody\":{\"app_sign\":\"287cca63e9316c031\",\"businesscode\":\"05\",\"note\":\"\",\"brnchcd\":\"4001\"," 
                  "\"b64pic\":\"\",\"inputtype\":\"11\",\"teller\":\"2666\",\"idcardno\":\"139891119211X\","\"name\":" 
                  "\"user\",\"wthrespic\":\"1\",\"app_id\":null,\"bankcode\":\"31100396\",\"timestamp\":\"1536118078193\"}}",
                   LAST);
      
       web_custom_request("request",
                  "Url=http://10.148.0.161:1111/check/idCardCheck",
                  "Method=POST",
                  "Mode=HTTP",
                  "EncType=application/json",
                  "RecContentType=application/json",
                  "Body=msgbody:{\"app_sign\":\"287cca63e9316c031\",\"businesscode\":\"05\",\"note\":\"\",\"brnchcd\":\"4001\"," 
                  "\"b64pic\":\"\",\"inputtype\":\"11\",\"teller\":\"2666\",\"idcardno\":\"139891119211X\","\"name\":" 
                  "\"user\",\"wthrespic\":\"1\",\"app_id\":null,\"bankcode\":\"31100396\",\"timestamp\":\"1536118078193\"}",
                   LAST);

結論：如果提供的報文是key：value格式的就使用web_submit_data()函數，反之可選擇使用web_custom_request（）函數，如以上內容表述或總結后期會不斷完善。