我想获取body的值，怎么做

object(HttpResponse)#11 (7) {
  ["content":"HttpResponse":private] => string(1047) "HTTP/1.1 200 OK
Server: Tengine
Date: Fri, 22 Jun 2018 09:52:33 GMT
Content-Type: application/json; charset=UTF-8
Content-Length: 52
Connection: keep-alive
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,POST,PUT,DELETE,HEAD,OPTIONS,PATCH
Access-Control-Allow-Headers: X-Requested-With,X-Sequence,X-Ca-Key,X-Ca-Secret,X-Ca-Version,X-Ca-Timestamp,X-Ca-Nonce,X-Ca-API-Key,X-Ca-Stage,X-Ca-Client-DeviceId,X-Ca-Client-AppId,X-Ca-Signature,X-Ca-Signature-Headers,X-Ca-Signature-Method,X-Forwarded-For,X-Ca-Date,X-Ca-Request-Mode,Authorization,Content-Type,Accept,Accept-Ranges,Cache-Control,Range,Content-MD5
Access-Control-Max-Age: 172800
X-Ca-Request-Id: CC7C80AD-3CCB-4F54-B14D-3BDA143AC3BE
Vary: Accept-Encoding
ufe-result: A2
Pragma: no-cache
Cache-Control: no-store
Via: 71aae546d43b[web,200]
Set-Cookie: SERVERID=c0cb0a9f805e8a70fc370b48877e9e8e|1529661153|1529661153;Path=/
X-Ca-Error-Message: OK
X-Ca-Debug-Info: {"TotalLatency":81,"ServiceLatency":55}

{"code":601,"message":"数据不存在","data":null}"
  ["body":"HttpResponse":private] => string(52) "{"code":601,"message":"数据不存在","data":null}"
  ["header":"HttpResponse":private] => string(995) "HTTP/1.1 200 OK
Server: Tengine
Date: Fri, 22 Jun 2018 09:52:33 GMT
Content-Type: application/json; charset=UTF-8
Content-Length: 52
Connection: keep-alive
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,POST,PUT,DELETE,HEAD,OPTIONS,PATCH
Access-Control-Allow-Headers: X-Requested-With,X-Sequence,X-Ca-Key,X-Ca-Secret,X-Ca-Version,X-Ca-Timestamp,X-Ca-Nonce,X-Ca-API-Key,X-Ca-Stage,X-Ca-Client-DeviceId,X-Ca-Client-AppId,X-Ca-Signature,X-Ca-Signature-Headers,X-Ca-Signature-Method,X-Forwarded-For,X-Ca-Date,X-Ca-Request-Mode,Authorization,Content-Type,Accept,Accept-Ranges,Cache-Control,Range,Content-MD5
Access-Control-Max-Age: 172800
X-Ca-Request-Id: CC7C80AD-3CCB-4F54-B14D-3BDA143AC3BE
Vary: Accept-Encoding
ufe-result: A2
Pragma: no-cache
Cache-Control: no-store
Via: 71aae546d43b[web,200]
Set-Cookie: SERVERID=c0cb0a9f805e8a70fc370b48877e9e8e|1529661153|1529661153;Path=/
X-Ca-Error-Message: OK
X-Ca-Debug-Info: {"TotalLatency":81,"ServiceLatency":55}

"
  ["requestId":"HttpResponse":private] => string(36) "CC7C80AD-3CCB-4F54-B14D-3BDA143AC3BE"
  ["errorMessage":"HttpResponse":private] => string(2) "OK"
  ["contentType":"HttpResponse":private] => string(31) "application/json; charset=UTF-8"
  ["httpStatusCode":"HttpResponse":private] => int(200)
}