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client.go
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client.go
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package github
import (
"bytes"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"time"
"github.com/tomnomnom/linkheader"
)
// Client represents a GitHub client.
type Client interface {
GetLogin() (*User, error)
ListUsers() Users
GetUser(string) (*User, error)
ListMembers(string) Members
GetRepo(string) (*Repo, error)
UpdateRepo(string, *UpdateRepoParams) (*Repo, error)
ListLabels(string) Labels
CreateLabel(string, *CreateLabelParams) (*Label, error)
UpdateLabel(string, string, *UpdateLabelParams) (*Label, error)
ListIssues(string, *ListIssuesParams) Issues
GetIssue(string, int) (*Issue, error)
AddAssignees(string, int, []string) error
ListComments(string, int) Comments
ListEvents(string, int) Events
ListPullReqs(string, *ListPullReqsParams) PullReqs
GetPullReq(string, int) (*PullReq, error)
ListPullReqCommits(string, int) Commits
GetDiff(string, string) (string, error)
GetCompare(string, string, string) (string, error)
ListReviews(string, int) Reviews
GetReview(string, int, int) (*Review, error)
ListReviewComments(string, int) ReviewComments
ListProjects(string, *ListProjectsParams) Projects
GetProject(int) (*Project, error)
CreateProject(string, *CreateProjectParams) (*Project, error)
UpdateProject(int, *UpdateProjectParams) (*Project, error)
DeleteProject(int) error
ListProjectColumns(int) ProjectColumns
GetProjectColumn(int) (*ProjectColumn, error)
CreateProjectColumn(int, string) (*ProjectColumn, error)
UpdateProjectColumn(int, string) (*ProjectColumn, error)
ListProjectCards(int) ProjectCards
GetProjectCard(int) (*ProjectCard, error)
CreateProjectCard(int, *CreateProjectCardParams) (*ProjectCard, error)
UpdateProjectCard(int, *UpdateProjectCardParams) (*ProjectCard, error)
MoveProjectCard(int, *MoveProjectCardParams) (*ProjectCard, error)
ListMilestones(string, *ListMilestonesParams) Milestones
GetMilestone(string, int) (*Milestone, error)
CreateMilestone(string, *CreateMilestoneParams) (*Milestone, error)
UpdateMilestone(string, int, *UpdateMilestoneParams) (*Milestone, error)
DeleteMilestone(string, int) error
ListHooks(string) Hooks
GetHook(string, int) (*Hook, error)
CreateHook(string, *CreateHookParams) (*Hook, error)
UpdateHook(string, int, *UpdateHookParams) (*Hook, error)
Import(string, *Import) (*ImportResult, error)
GetImport(string, int) (*ImportResult, error)
}
// New creates a new GitHub client.
func New(token, endpoint, proxy string, opts ...ClientOption) Client {
cli := &http.Client{Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: endpoint != "https://api.github.com",
},
}}
if proxy != "" {
proxyURL, err := url.Parse(proxy)
if err != nil {
panic(err)
}
cli.Transport.(*http.Transport).Proxy = http.ProxyURL(proxyURL)
}
c := &client{token, endpoint, cli, &Logger{}}
for _, opt := range opts {
opt(c)
}
return c
}
// ClientOption is an option of client.
type ClientOption func(*client)
// ClientLogger returns a client option to set the logger.
func ClientLogger(l *Logger) ClientOption {
return func(c *client) {
c.logger = l
}
}
type client struct {
token, endpoint string
client *http.Client
logger *Logger
}
func (c *client) url(path string) string {
return c.endpoint + path
}
func (c *client) do(method, path string, body interface{}) (*http.Response, error) {
var retryCnt int
duration := time.Minute
for {
res, retry, err := c.doOnce(method, path, body)
if err == nil || !retry || retryCnt >= 7 {
return res, err
}
retryCnt++
if retryCnt > 2 {
duration *= 2
if duration > 10*time.Minute {
duration = 10 * time.Minute
}
}
time.Sleep(duration)
}
}
func (c *client) doOnce(method, path string, body interface{}) (*http.Response, bool, error) {
var b io.Reader
if body != nil {
bs, err := json.Marshal(body)
if err != nil {
return nil, false, err
}
b = bytes.NewReader(bs)
}
req, err := c.request(method, path, b)
if err != nil {
return nil, false, err
}
return c.doReq(req)
}
func (c *client) request(method, path string, body io.Reader) (*http.Request, error) {
req, err := http.NewRequest(method, path, body)
if err != nil {
return nil, err
}
req.Header.Add("Authorization", "token "+c.token)
req.Header.Add("Accept", "application/vnd.github.golden-comet-preview+json")
req.Header.Add("Accept", "application/vnd.github.symmetra-preview+json")
req.Header.Add("Accept", "application/vnd.github.comfort-fade-preview+json")
req.Header.Add("Accept", "application/vnd.github.sailor-v-preview+json")
req.Header.Add("Accept", "application/vnd.github.starfox-preview+json")
req.Header.Add("Accept", "application/vnd.github.inertia-preview+json")
req.Header.Add("User-Agent", "github-migrator")
return req, nil
}
func (c *client) doReq(req *http.Request) (*http.Response, bool, error) {
c.logger.preRequest(req)
res, err := c.client.Do(req)
c.logger.postRequest(res, err)
if err != nil {
return nil, true, err
}
if res.StatusCode < 200 || 400 <= res.StatusCode {
return nil, 500 <= res.StatusCode, getError(res)
}
return res, false, nil
}
func getError(res *http.Response) error {
defer res.Body.Close()
var r struct {
Message string `json:"message"`
Errors apiErrors `json:"errors"`
}
if err := json.NewDecoder(res.Body).Decode(&r); err != nil {
return err
}
if len(r.Errors) == 0 {
return errors.New(r.Message)
}
return fmt.Errorf("%s: %w", r.Message, r.Errors)
}
func (c *client) get(path string, v interface{}) error {
res, err := c.do("GET", path, nil)
if err != nil {
return err
}
defer res.Body.Close()
if err := json.NewDecoder(res.Body).Decode(&v); err != nil {
return err
}
return nil
}
func (c *client) post(path string, body, v interface{}) error {
res, err := c.do("POST", path, body)
if err != nil {
return err
}
defer res.Body.Close()
if err := json.NewDecoder(res.Body).Decode(&v); err != nil {
return err
}
return nil
}
func (c *client) patch(path string, body, v interface{}) error {
res, err := c.do("PATCH", path, body)
if err != nil {
return err
}
defer res.Body.Close()
if err := json.NewDecoder(res.Body).Decode(&v); err != nil {
return err
}
return nil
}
func (c *client) delete(path string) error {
res, err := c.do("DELETE", path, nil)
if err != nil {
return err
}
defer res.Body.Close()
return nil
}
func (c *client) getList(path string, v interface{}) (string, error) {
res, err := c.do("GET", path, nil)
if err != nil {
return "", err
}
defer res.Body.Close()
if err := json.NewDecoder(res.Body).Decode(&v); err != nil {
return "", err
}
return getNext(res.Header), nil
}
func getNext(header http.Header) string {
xs := header["Link"]
if len(xs) == 0 {
return ""
}
links := linkheader.Parse(xs[0])
for _, link := range links {
if link.Rel == "next" {
return link.URL
}
}
return ""
}