使用 Golang 客户端库向 GCP 计算批量发出请求

小伙伴们对Golang编程感兴趣吗？是否正在学习相关知识点？如果是，那么本文《使用 Golang 客户端库向 GCP 计算批量发出请求》，就很适合你，本篇文章讲解的知识点主要包括。在之后的文章中也会多多分享相关知识点，希望对大家的知识积累有所帮助！

是否可以使用 Go 的 Google API 客户端库执行批量请求？

更准确地说，我想删除一些磁盘；如果我可以避免对每个磁盘的请求，那就太好了。

我指的是批量请求功能： https://cloud.google.com/compute/docs/api/how-tos/batch

我正在使用的客户端库： https://github.com/googleapis/google-api-go-client

似乎还有另一个客户端库，但不支持计算引擎，只有元数据（？）： https://github.com/GoogleCloudPlatform/google-cloud-go

解决方案

我不确定，但我认为这是可以完成的，因为我们可以使用 api 调用删除磁盘。 批量请求由多个api调用组合成一个http请求，可以发送到API discovery document中指定的batchpath。默认路径为/batch/api_name/api_version。

Example看一下批量请求Here的格式

// method id "compute.disks.delete":

type DisksDeleteCall struct {
    s          *Service
    project    string
    zone       string
    disk       string
    urlParams_ gensupport.URLParams
    ctx_       context.Context
    header_    http.Header
}

// Delete: Deletes the specified persistent disk. Deleting a disk
// removes its data permanently and is irreversible. However, deleting a
// disk does not delete any snapshots previously made from the disk. You
// must separately delete snapshots.
// For details, see https://cloud.google.com/compute/docs/reference/latest/disks/delete
func (r *DisksService) Delete(project string, zone string, disk string) *DisksDeleteCall {
    c := &DisksDeleteCall{s: r.s, urlParams_: make(gensupport.URLParams)}
    c.project = project
    c.zone = zone
    c.disk = disk
    return c
}

// RequestId sets the optional parameter "requestId": An optional
// request ID to identify requests. Specify a unique request ID so that
// if you must retry your request, the server will know to ignore the
// request if it has already been completed.
//
// For example, consider a situation where you make an initial request
// and the request times out. If you make the request again with the
// same request ID, the server can check if original operation with the
// same request ID was received, and if so, will ignore the second
// request. This prevents clients from accidentally creating duplicate
// commitments.
//
// The request ID must be a valid UUID with the exception that zero UUID
// is not supported (00000000-0000-0000-0000-000000000000).
func (c *DisksDeleteCall) RequestId(requestId string) *DisksDeleteCall {
    c.urlParams_.Set("requestId", requestId)
    return c
}

// Fields allows partial responses to be retrieved. See
// https://developers.google.com/gdata/docs/2.0/basics#PartialResponse
// for more information.
func (c *DisksDeleteCall) Fields(s ...googleapi.Field) *DisksDeleteCall {
    c.urlParams_.Set("fields", googleapi.CombineFields(s))
    return c
}

// Context sets the context to be used in this call's Do method. Any
// pending HTTP request will be aborted if the provided context is
// canceled.
func (c *DisksDeleteCall) Context(ctx context.Context) *DisksDeleteCall {
    c.ctx_ = ctx
    return c
}

// Header returns an http.Header that can be modified by the caller to
// add HTTP headers to the request.
func (c *DisksDeleteCall) Header() http.Header {
    if c.header_ == nil {
        c.header_ = make(http.Header)
    }
    return c.header_
}

func (c *DisksDeleteCall) doRequest(alt string) (*http.Response, error) {
    reqHeaders := make(http.Header)
    for k, v := range c.header_ {
        reqHeaders[k] = v
    }
    reqHeaders.Set("User-Agent", c.s.userAgent())
    var body io.Reader = nil
    c.urlParams_.Set("alt", alt)
    c.urlParams_.Set("prettyPrint", "false")
    urls := googleapi.ResolveRelative(c.s.BasePath, "{project}/zones/{zone}/disks/{disk}")
    urls += "?" + c.urlParams_.Encode()
    req, _ := http.NewRequest("DELETE", urls, body)
    req.Header = reqHeaders
    googleapi.Expand(req.URL, map[string]string{
        "project": c.project,
        "zone":    c.zone,
        "disk":    c.disk,
    })
    return gensupport.SendRequest(c.ctx_, c.s.client, req)
}

// Do executes the "compute.disks.delete" call.
// Exactly one of *Operation or error will be non-nil. Any non-2xx
// status code is an error. Response headers are in either
// *Operation.ServerResponse.Header or (if a response was returned at
// all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified
// to check whether the returned error was because
// http.StatusNotModified was returned.
func (c *DisksDeleteCall) Do(opts ...googleapi.CallOption) (*Operation, error) {
    gensupport.SetOptions(c.urlParams_, opts...)
    res, err := c.doRequest("json")
    if res != nil && res.StatusCode == http.StatusNotModified {
        if res.Body != nil {
            res.Body.Close()
        }
        return nil, &googleapi.Error{
            Code:   res.StatusCode,
            Header: res.Header,
        }
    }
    if err != nil {
        return nil, err
    }
    defer googleapi.CloseBody(res)
    if err := googleapi.CheckResponse(res); err != nil {
        return nil, err
    }
    ret := &Operation{
        ServerResponse: googleapi.ServerResponse{
            Header:         res.Header,
            HTTPStatusCode: res.StatusCode,
        },
    }
    target := &ret
    if err := gensupport.DecodeResponse(target, res); err != nil {
        return nil, err
    }
    return ret, nil
    // {
    //   "description": "Deletes the specified persistent disk. Deleting a disk removes its data permanently and is irreversible. However, deleting a disk does not delete any snapshots previously made from the disk. You must separately delete snapshots.",
    //   "httpMethod": "DELETE",
    //   "id": "compute.disks.delete",
    //   "parameterOrder": [
    //     "project",
    //     "zone",
    //     "disk"
    //   ],
    //   "parameters": {
    //     "disk": {
    //       "description": "Name of the persistent disk to delete.",
    //       "location": "path",
    //       "required": true,
    //       "type": "string"
    //     },
    //     "project": {
    //       "description": "Project ID for this request.",
    //       "location": "path",
    //       "pattern": "(?:(?:[-a-z0-9]{1,63}\\.)*(?:[a-z](?:[-a-z0-9]{0,61}[a-z0-9])?):)?(?:[0-9]{1,19}|(?:[a-z0-9](?:[-a-z0-9]{0,61}[a-z0-9])?))",
    //       "required": true,
    //       "type": "string"
    //     },
    //     "requestId": {
    //       "description": "An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed.\n\nFor example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments.\n\nThe request ID must be a valid UUID with the exception that zero UUID is not supported (00000000-0000-0000-0000-000000000000).",
    //       "location": "query",
    //       "type": "string"
    //     },
    //     "zone": {
    //       "description": "The name of the zone for this request.",
    //       "location": "path",
    //       "pattern": "[a-z](?:[-a-z0-9]{0,61}[a-z0-9])?",
    //       "required": true,
    //       "type": "string"
    //     }
    //   },
    //   "path": "{project}/zones/{zone}/disks/{disk}",
    //   "response": {
    //     "$ref": "Operation"
    //   },
    //   "scopes": [
    //     "https://www.googleapis.com/auth/cloud-platform",
    //     "https://www.googleapis.com/auth/compute"
    //   ]
    // }

}

文中关于的知识介绍，希望对你的学习有所帮助！若是受益匪浅，那就动动鼠标收藏这篇《使用 Golang 客户端库向 GCP 计算批量发出请求》文章吧，也可关注golang学习网公众号了解相关技术文章。