web_custom_request请求关联session的问题（二）

问题

loadrunner 脚本中关联session仍不可用

过程分析

//错误写法char *body;body=        "{"        "\"body\":{"            "\"scanCode\":\"xxxxxxxxxx\","            "\"longitude\":\"xxx\","            "\"latitude\":\"xxx\","            "\"openLock\":\"0\""        "},"        "\"header\":{"            "\"appType\":\"1\","            "\"appVersion\":\"2.1.2\","            "\"cardCode\":\"xxxxxxxxxx\","            "\"channelId\":\"xxxxxxxxxx\","            "\"cityId\":\"591\","            "\"deviceId\":\"xxxxxxxxxx\","            "\"sessionId\":{getSessionId}"

• 将获得的getSessionId打印出来，直接替换到后面的请求{getSessionId}里发请求时遇到换行符返回登录失败
• 将换行符转义（删除过滤掉发现也行）能发起正确的请求响应
• 请求的数据是Json格式，含 {}符号，参数的获取也是{}，是否存在冲突
• 最后发现定义的变量里不能这么用参数，通过打印body数据发现打印的是字符串“{getSessionId}”，没有进行值替换

处理

• 定义字符串变量，将body常量拼接
• 将session值通过方法lr_eval_string(“{getSessionId}”)传入，然后再通过strcat拼接到body中
• 过滤sessionId中的换行符（参考:LoadRunner中自定义C函数实现字符串替换）

// 没有初始化body，会得到不可预知的结果char body[1024]="";strcat(body,        "{"        "\"body\":{"            "\"scanCode\":\"xxxxxxxxxx\","            "\"longitude\":\"xxx\","            "\"latitude\":\"xxx\","            "\"openLock\":\"0\""        "},"        "\"header\":{"            "\"appType\":\"1\","            "\"appVersion\":\"2.1.2\","            "\"cardCode\":\"xxxxxxxxxx\","            "\"channelId\":\"xxxxxxxxxx\","            "\"cityId\":\"591\","            "\"deviceId\":\"xxxxxxxxxx\","            "\"sessionId\":");    strcat(body,lr_eval_string("{getSessionId}"));    strcat(body,"}}");

再次发起请求，得到了预期的响应。