基于netcore的webapi 返回json多重转义符导致反序列异常问题
最近用netcore做服务端来实现客户端更新下载功能。
获取版本号如下:
/// <summary>
/// Gets this instance.
/// </summary>
/// <returns></returns>
[HttpGet]
[Route("GetVersion")]
public string GetVersion()
{
_logger.LogInformation("======receive getVersion request!");
VersionInfo info = new VersionInfo {Result = _appModel};
var msg = JsonConvert.SerializeObject(info);
_logger.LogInformation($"======send getVersion response;{msg}!");
return msg;
}
但是客户端实际收到的字符串多了一层转义符“\\”,导致反序列化为实体时候失败,抛出异常。
尝试修改返回值类型为通用的IActionResult,代码如下:
/// <summary>
/// Gets this instance.
/// </summary>
/// <returns></returns>
[HttpGet]
[Route("GetVersion")]
public IActionResult GetVersion()
{
_logger.LogInformation("======receive getVersion request!");
VersionInfo info = new VersionInfo {Result = _appModel};
var msg = JsonConvert.SerializeObject(info);
_logger.LogInformation($"======send getVersion response;{msg}!");
return Ok(msg);
}
客户端收到内容还是一样,多了一层转义符“\\”.最终在微软官网找到答案:
最终解决办法:
原来netcore会自动的将返回对象进行序列化,我们返回之前就已经序列化过了,就导致重复序列化就多了转义符“\\”,所以去除返回之前的序列就好了,直接返回实体对象。最终代码如下:
/// <summary>
/// Gets this instance.
/// </summary>
/// <returns></returns>
[HttpGet]
[Route("GetVersion")]
public IActionResult GetVersion()
{
_logger.LogInformation("======receive getVersion request!");
VersionInfo info = new VersionInfo {Result = _appModel};
return Ok(info);
}