Api 检索JSON内容

我是拉威尔的初学者。我在创建PostAPI时遇到问题。 我想使用从其他应用程序的json POST检索的数据。但是它总是返回null，所以我对请求做了一些调查

当我返回dd（$request）时，结果是

Illuminate\Http\Request {#43 ▼
  #json: Symfony\Component\HttpFoundation\ParameterBag {#35 ▶}
  #convertedFiles: []
  #userResolver: Closure($guard = null) {#1241 ▼
    class: "Illuminate\Auth\AuthServiceProvider"
    this: Illuminate\Auth\AuthServiceProvider {#22 …}
    use: {▶}
    file: "C:\xampp\htdocs\attendance_online\vendor\laravel\framework\src\Illuminate\Auth\AuthServiceProvider.php"
    line: "105 to 107"
  }
  #routeResolver: Closure() {#1246 ▼
    class: "Illuminate\Routing\Router"
    this: Illuminate\Routing\Router {#26 …}
    use: {▶}
    file: "C:\xampp\htdocs\attendance_online\vendor\laravel\framework\src\Illuminate\Routing\Router.php"
    line: "655 to 657"
  }
  +attributes: Symfony\Component\HttpFoundation\ParameterBag {#45 ▼
    #parameters: []
  }
  +request: Symfony\Component\HttpFoundation\ParameterBag {#35 ▼
    #parameters: []
  }
  +query: Symfony\Component\HttpFoundation\InputBag {#51 ▼
    #parameters: []
  }
  +server: Symfony\Component\HttpFoundation\ServerBag {#47 ▼
    #parameters: array:23 [▶]
  }
  +files: Symfony\Component\HttpFoundation\FileBag {#48 ▼
    #parameters: []
  }
  +cookies: Symfony\Component\HttpFoundation\InputBag {#46 ▼
    #parameters: []
  }
  +headers: Symfony\Component\HttpFoundation\HeaderBag {#49 ▼
    #headers: array:6 [▼
      "accept-encoding" => array:1 [▼
        0 => "gzip,deflate"
      ]
      "content-type" => array:1 [▼
        0 => "application/json"
      ]
      "content-length" => array:1 [▼
        0 => "231"
      ]
      "host" => array:1 [▼
        0 => "localhost:8000"
      ]
      "connection" => array:1 [▼
        0 => "Keep-Alive"
      ]
      "user-agent" => array:1 [▼
        0 => "Apache-HttpClient/4.5.5 (Java/12.0.1)"
      ]
    ]
    #cacheControl: []
  }
  #content: """
    {\n
    \t"id_employee" = "4",\n
    \t"status" = "1",\n
    \t"latitude" = "3.4141414",\n
    \t"longitude" = "98.444444",\n
    \t"timestamp" = "2020-10-11 09:58:00.0000000",\n
    \t"approval" = "1",\n
    \t"message" = "this is message",\n
    \t"picture_reference" = "this is pic"\n
    }
    """
  #languages: null
  #charsets: null
  #encodings: null
  #acceptableContentTypes: null
  #pathInfo: "/api/Attendance"
  #requestUri: "/api/Attendance"
  #baseUrl: ""
  #basePath: null
  #method: "POST"
  #format: null
  #session: null
  #locale: null
  #defaultLocale: "en"
  -preferredFormat: null
  -isHostValid: true
  -isForwardedValid: true
  -isSafeContentPreferred: null
  basePath: ""
  format: "html"
}
}

{ "id_employee" = "4", "status" = "1", "latitude" = "3.4141414", "longitude" = "98.444444", "timestamp" = "2020-10-11 09:58:00.0000000", "approval" = "1", "message" = "this is message", "picture_reference" = "this is pic" }

当我返回$request->getcontent（）时，结果是

Illuminate\Http\Request {#43 ▼
  #json: Symfony\Component\HttpFoundation\ParameterBag {#35 ▶}
  #convertedFiles: []
  #userResolver: Closure($guard = null) {#1241 ▼
    class: "Illuminate\Auth\AuthServiceProvider"
    this: Illuminate\Auth\AuthServiceProvider {#22 …}
    use: {▶}
    file: "C:\xampp\htdocs\attendance_online\vendor\laravel\framework\src\Illuminate\Auth\AuthServiceProvider.php"
    line: "105 to 107"
  }
  #routeResolver: Closure() {#1246 ▼
    class: "Illuminate\Routing\Router"
    this: Illuminate\Routing\Router {#26 …}
    use: {▶}
    file: "C:\xampp\htdocs\attendance_online\vendor\laravel\framework\src\Illuminate\Routing\Router.php"
    line: "655 to 657"
  }
  +attributes: Symfony\Component\HttpFoundation\ParameterBag {#45 ▼
    #parameters: []
  }
  +request: Symfony\Component\HttpFoundation\ParameterBag {#35 ▼
    #parameters: []
  }
  +query: Symfony\Component\HttpFoundation\InputBag {#51 ▼
    #parameters: []
  }
  +server: Symfony\Component\HttpFoundation\ServerBag {#47 ▼
    #parameters: array:23 [▶]
  }
  +files: Symfony\Component\HttpFoundation\FileBag {#48 ▼
    #parameters: []
  }
  +cookies: Symfony\Component\HttpFoundation\InputBag {#46 ▼
    #parameters: []
  }
  +headers: Symfony\Component\HttpFoundation\HeaderBag {#49 ▼
    #headers: array:6 [▼
      "accept-encoding" => array:1 [▼
        0 => "gzip,deflate"
      ]
      "content-type" => array:1 [▼
        0 => "application/json"
      ]
      "content-length" => array:1 [▼
        0 => "231"
      ]
      "host" => array:1 [▼
        0 => "localhost:8000"
      ]
      "connection" => array:1 [▼
        0 => "Keep-Alive"
      ]
      "user-agent" => array:1 [▼
        0 => "Apache-HttpClient/4.5.5 (Java/12.0.1)"
      ]
    ]
    #cacheControl: []
  }
  #content: """
    {\n
    \t"id_employee" = "4",\n
    \t"status" = "1",\n
    \t"latitude" = "3.4141414",\n
    \t"longitude" = "98.444444",\n
    \t"timestamp" = "2020-10-11 09:58:00.0000000",\n
    \t"approval" = "1",\n
    \t"message" = "this is message",\n
    \t"picture_reference" = "this is pic"\n
    }
    """
  #languages: null
  #charsets: null
  #encodings: null
  #acceptableContentTypes: null
  #pathInfo: "/api/Attendance"
  #requestUri: "/api/Attendance"
  #baseUrl: ""
  #basePath: null
  #method: "POST"
  #format: null
  #session: null
  #locale: null
  #defaultLocale: "en"
  -preferredFormat: null
  -isHostValid: true
  -isForwardedValid: true
  -isSafeContentPreferred: null
  basePath: ""
  format: "html"
}
}

{ "id_employee" = "4", "status" = "1", "latitude" = "3.4141414", "longitude" = "98.444444", "timestamp" = "2020-10-11 09:58:00.0000000", "approval" = "1", "message" = "this is message", "picture_reference" = "this is pic" }

但是当我返回$request->all（）时

---

并且已经确认$request->isjson（）返回1

您有什么版本的Laravel？您应该能够解码JSON内容，如下所示：

$content=$request->getContent（）
$data=json_decode（$content，true）
dd（数据）

---

不过，请检查JSON是否有效-您在原始问题中发布的示例有

=

，其中

：

通常应该放在哪里！JSON必须有效，如果请求具有正确的内容类型头，那么对

request->input（“employee_id”）

的调用应该可以工作。这并没有让我怀疑JSON是否格式正确，所以一定要检查一下。

这行不是已经显示请求是有效的JSON post请求了吗<代码>+标题：Symfony\Component\HttpFoundation\HeaderBag{49▼ #标题：数组：6[▼ “接受编码”=>数组：1[▼ 0=>“gzip，deflate”]“内容类型”=>数组：1[▼ 0=>“application/json”]我的json似乎格式不好，因为我发现了小的错误类型。我已经决定将数据放在url（参数）上，但是，再次检查后，在关闭括号之前，似乎有1个野生逗号，我假设json不可读。