119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
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package client
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import (
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"encoding/json"
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"errors"
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"fmt"
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"github.com/olekukonko/tablewriter"
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"github.com/qiniu/goc/v2/pkg/log"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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"net/url"
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"os"
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)
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// Action provides methods to contact with the covered agent under test
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type Action interface {
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ListAgents()
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}
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const (
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// CoverAgentsListAPI list all the registered agents
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CoverAgentsListAPI = "/v2/rpcagents"
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)
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var (
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ERROR_GOC_LIST = errors.New("goc list failed")
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)
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type client struct {
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Host string
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client *http.Client
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}
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// gocListAgents response of the list request
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type gocListAgents struct {
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Items []gocCoveredAgent `json:"items"`
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}
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// gocCoveredAgent represents a covered client
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type gocCoveredAgent struct {
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Id string `json:"id"`
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RemoteIP string `json:"remoteip"`
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Hostname string `json:"hostname"`
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CmdLine string `json:"cmdline"`
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Pid string `json:"pid"`
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}
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// NewWorker creates a worker to contact with host
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func NewWorker(host string) Action {
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_, err := url.ParseRequestURI(host)
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if err != nil {
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log.Fatalf("Parse url %s failed, err: %v", host, err)
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}
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return &client{
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Host: host,
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client: http.DefaultClient,
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}
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}
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func (c *client) ListAgents() {
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u := fmt.Sprintf("%s%s", c.Host, CoverAgentsListAPI)
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_, body, err := c.do("GET", u, "", nil)
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if err != nil && isNetworkError(err) {
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_, body, err = c.do("GET", u, "", nil)
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}
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if err != nil {
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err = fmt.Errorf("%w: %v", ERROR_GOC_LIST, err)
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log.Fatalf(err.Error())
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}
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agents := gocListAgents{}
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err = json.Unmarshal(body, &agents)
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if err != nil {
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err = fmt.Errorf("%w: json unmarshal failed: %v", ERROR_GOC_LIST, err)
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log.Fatalf(err.Error())
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}
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table := tablewriter.NewWriter(os.Stdout)
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table.SetHeader([]string{"ID", "RemoteIP", "Hostname", "Pid", "CMD"})
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table.SetAutoFormatHeaders(false)
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table.SetColumnAlignment([]int{tablewriter.ALIGN_CENTER, tablewriter.ALIGN_CENTER, tablewriter.ALIGN_CENTER, tablewriter.ALIGN_CENTER, tablewriter.ALIGN_CENTER})
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for _, agent := range agents.Items {
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table.Append([]string{agent.Id, agent.RemoteIP, agent.Hostname, agent.Pid, agent.CmdLine})
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}
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table.Render()
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return
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}
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func (c *client) do(method, url, contentType string, body io.Reader) (*http.Response, []byte, error) {
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req, err := http.NewRequest(method, url, body)
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if err != nil {
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return nil, nil, err
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}
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if contentType != "" {
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req.Header.Set("Content-Type", contentType)
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}
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res, err := c.client.Do(req)
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if err != nil {
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return nil, nil, err
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}
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defer res.Body.Close()
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responseBody, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return res, nil, err
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}
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return res, responseBody, nil
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}
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func isNetworkError(err error) bool {
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if err == io.EOF {
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return true
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}
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_, ok := err.(net.Error)
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return ok
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}
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