Es könnten nur eine oder zwei Codezeilen sein, wie zum Beispiel:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

## 存档回调

实际的回调代码高度依赖于您自己的 API 应用。

并且可能每个应用都各不相同。

回调代码可能只有一两行，比如：

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
requests.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

但回调最重要的部分可能是，根据 API 要发送给回调请求体的数据等内容，确保您的 API 用户（外部开发者）正确地实现*外部 API*。

因此，我们下一步要做的就是添加代码，为从 API 接收回调的*外部 API*存档。

这部分文档在 `/docs` 下的 Swagger API 文档中显示，并且会告诉外部开发者如何构建*外部 API*。

It could be just one or two lines of code, like:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

//go:nosplit
func syscall_setsid() (pid, err uintptr) {
	pid, err = syscall0(&libc_setsid)
	return
}

//go:linkname syscall_setuid syscall.setuid
//go:nosplit
func syscall_setuid(uid uintptr) (err uintptr) {
	_, err = syscall1(&libc_setuid, uid)
	return
}

//go:linkname syscall_setpgid syscall.setpgid
//go:nosplit
func syscall_setpgid(pid, pgid uintptr) (err uintptr) {

        elementName("root:appId") == "root-appId"
        elementName("root:servicesId") == "root-servicesId"
        elementName("root:services") == "root-services"
        elementName("root:servicesId:barId") == "bar"
        elementName("root:servicesId:barId:app") == "root-services-bar-app"
        elementName("root:servicesId:barId:appId") == "root-services-bar-appId"
    }

this.ppids_[pid]=ppid;thread.sliceGroup.beginSlice(category,title,ts,args);break;}
case'E':{const ppid=this.ppids_[pid];if(ppid===undefined){break;}
const thread=this.model_.getOrCreateProcess(ppid).getOrCreateThread(pid);if(!thread.sliceGroup.openSliceCount){break;}

			},
		}
	}

	cpID := pilotxds.IstioControlPlaneInstance{}
	err := json.Unmarshal([]byte(xdsResponse.ControlPlane.Identifier), &cpID)
	if err != nil {
		return pilotxds.IstioControlPlaneInstance{
			Component: "INVALID",
			ID:        "INVALID",
			Info: istioversion.BuildInfo{
				Version: "INVALID CP ID",
			},
		}
	}
	return cpID

	} else {
		if epInfo.hnsID != "EPID-3" {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *proxier.endPointsRefCount["EPID-3"] <= 0 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[endpointGuid1])
	}

	if *proxier.endPointsRefCount["EPID-3"] != *epInfo.refCount {

      "diskURI": "diskURIValue",
      "cachingMode": "cachingModeValue",
      "fsType": "fsTypeValue",
      "readOnly": true,
      "kind": "kindValue"
    },
    "photonPersistentDisk": {
      "pdID": "pdIDValue",
      "fsType": "fsTypeValue"
    },
    "portworxVolume": {
      "volumeID": "volumeIDValue",
      "fsType": "fsTypeValue",
      "readOnly": true
    },
    "scaleIO": {

      "diskURI": "diskURIValue",
      "cachingMode": "cachingModeValue",
      "fsType": "fsTypeValue",
      "readOnly": true,
      "kind": "kindValue"
    },
    "photonPersistentDisk": {
      "pdID": "pdIDValue",
      "fsType": "fsTypeValue"
    },
    "portworxVolume": {
      "volumeID": "volumeIDValue",
      "fsType": "fsTypeValue",
      "readOnly": true
    },
    "scaleIO": {