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// Copyright 2013 The go-github AUTHORS. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:generate go run gen-accessors.go
//go:generate go run gen-stringify-test.go
package github
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"reflect"
"strconv"
"strings"
"sync"
"time"
"github.com/google/go-querystring/query"
)
const (
defaultBaseURL = "https://api.github.com/"
uploadBaseURL = "https://uploads.github.com/"
userAgent = "go-github"
headerRateLimit = "X-RateLimit-Limit"
headerRateRemaining = "X-RateLimit-Remaining"
headerRateReset = "X-RateLimit-Reset"
headerOTP = "X-GitHub-OTP"
headerTokenExpiration = "GitHub-Authentication-Token-Expiration"
mediaTypeV3 = "application/vnd.github.v3+json"
defaultMediaType = "application/octet-stream"
mediaTypeV3SHA = "application/vnd.github.v3.sha"
mediaTypeV3Diff = "application/vnd.github.v3.diff"
mediaTypeV3Patch = "application/vnd.github.v3.patch"
mediaTypeOrgPermissionRepo = "application/vnd.github.v3.repository+json"
mediaTypeIssueImportAPI = "application/vnd.github.golden-comet-preview+json"
// Media Type values to access preview APIs
// These media types will be added to the API request as headers
// and used to enable particular features on GitHub API that are still in preview.
// After some time, specific media types will be promoted (to a "stable" state).
// From then on, the preview headers are not required anymore to activate the additional
// feature on GitHub.com's API. However, this API header might still be needed for users
// to run a GitHub Enterprise Server on-premise.
// It's not uncommon for GitHub Enterprise Server customers to run older versions which
// would probably rely on the preview headers for some time.
// While the header promotion is going out for GitHub.com, it may be some time before it
// even arrives in GitHub Enterprise Server.
// We keep those preview headers around to avoid breaking older GitHub Enterprise Server
// versions. Additionally, non-functional (preview) headers don't create any side effects
// on GitHub Cloud version.
//
// See https://github.com/google/go-github/pull/2125 for full context.
// https://developer.github.com/changes/2014-12-09-new-attributes-for-stars-api/
mediaTypeStarringPreview = "application/vnd.github.v3.star+json"
// https://help.github.com/enterprise/2.4/admin/guides/migrations/exporting-the-github-com-organization-s-repositories/
mediaTypeMigrationsPreview = "application/vnd.github.wyandotte-preview+json"
// https://developer.github.com/changes/2016-04-06-deployment-and-deployment-status-enhancements/
mediaTypeDeploymentStatusPreview = "application/vnd.github.ant-man-preview+json"
// https://developer.github.com/changes/2018-10-16-deployments-environments-states-and-auto-inactive-updates/
mediaTypeExpandDeploymentStatusPreview = "application/vnd.github.flash-preview+json"
// https://developer.github.com/changes/2016-05-12-reactions-api-preview/
mediaTypeReactionsPreview = "application/vnd.github.squirrel-girl-preview"
// https://developer.github.com/changes/2016-05-23-timeline-preview-api/
mediaTypeTimelinePreview = "application/vnd.github.mockingbird-preview+json"
// https://developer.github.com/changes/2016-09-14-projects-api/
mediaTypeProjectsPreview = "application/vnd.github.inertia-preview+json"
// https://developer.github.com/changes/2017-01-05-commit-search-api/
mediaTypeCommitSearchPreview = "application/vnd.github.cloak-preview+json"
// https://developer.github.com/changes/2017-02-28-user-blocking-apis-and-webhook/
mediaTypeBlockUsersPreview = "application/vnd.github.giant-sentry-fist-preview+json"
// https://developer.github.com/changes/2017-05-23-coc-api/
mediaTypeCodesOfConductPreview = "application/vnd.github.scarlet-witch-preview+json"
// https://developer.github.com/changes/2017-07-17-update-topics-on-repositories/
mediaTypeTopicsPreview = "application/vnd.github.mercy-preview+json"
// https://developer.github.com/changes/2018-03-16-protected-branches-required-approving-reviews/
mediaTypeRequiredApprovingReviewsPreview = "application/vnd.github.luke-cage-preview+json"
// https://developer.github.com/enterprise/2.13/v3/repos/pre_receive_hooks/
mediaTypePreReceiveHooksPreview = "application/vnd.github.eye-scream-preview"
// https://developer.github.com/changes/2018-02-22-protected-branches-required-signatures/
mediaTypeSignaturePreview = "application/vnd.github.zzzax-preview+json"
// https://developer.github.com/changes/2018-09-05-project-card-events/
mediaTypeProjectCardDetailsPreview = "application/vnd.github.starfox-preview+json"
// https://developer.github.com/changes/2018-12-18-interactions-preview/
mediaTypeInteractionRestrictionsPreview = "application/vnd.github.sombra-preview+json"
// https://developer.github.com/changes/2019-03-14-enabling-disabling-pages/
mediaTypeEnablePagesAPIPreview = "application/vnd.github.switcheroo-preview+json"
// https://developer.github.com/changes/2019-04-24-vulnerability-alerts/
mediaTypeRequiredVulnerabilityAlertsPreview = "application/vnd.github.dorian-preview+json"
// https://developer.github.com/changes/2019-06-04-automated-security-fixes/
mediaTypeRequiredAutomatedSecurityFixesPreview = "application/vnd.github.london-preview+json"
// https://developer.github.com/changes/2019-05-29-update-branch-api/
mediaTypeUpdatePullRequestBranchPreview = "application/vnd.github.lydian-preview+json"
// https://developer.github.com/changes/2019-04-11-pulls-branches-for-commit/
mediaTypeListPullsOrBranchesForCommitPreview = "application/vnd.github.groot-preview+json"
// https://docs.github.com/en/free-pro-team@latest/rest/reference/previews/#repository-creation-permissions
mediaTypeMemberAllowedRepoCreationTypePreview = "application/vnd.github.surtur-preview+json"
// https://docs.github.com/en/free-pro-team@latest/rest/reference/previews/#create-and-use-repository-templates
mediaTypeRepositoryTemplatePreview = "application/vnd.github.baptiste-preview+json"
// https://developer.github.com/changes/2019-10-03-multi-line-comments/
mediaTypeMultiLineCommentsPreview = "application/vnd.github.comfort-fade-preview+json"
// https://developer.github.com/changes/2019-11-05-deprecated-passwords-and-authorizations-api/
mediaTypeOAuthAppPreview = "application/vnd.github.doctor-strange-preview+json"
// https://developer.github.com/changes/2019-12-03-internal-visibility-changes/
mediaTypeRepositoryVisibilityPreview = "application/vnd.github.nebula-preview+json"
// https://developer.github.com/changes/2018-12-10-content-attachments-api/
mediaTypeContentAttachmentsPreview = "application/vnd.github.corsair-preview+json"
)
var errNonNilContext = errors.New("context must be non-nil")
// A Client manages communication with the GitHub API.
type Client struct {
clientMu sync.Mutex // clientMu protects the client during calls that modify the CheckRedirect func.
client *http.Client // HTTP client used to communicate with the API.
// Base URL for API requests. Defaults to the public GitHub API, but can be
// set to a domain endpoint to use with GitHub Enterprise. BaseURL should
// always be specified with a trailing slash.
BaseURL *url.URL
// Base URL for uploading files.
UploadURL *url.URL
// User agent used when communicating with the GitHub API.
UserAgent string
rateMu sync.Mutex
rateLimits [categories]Rate // Rate limits for the client as determined by the most recent API calls.
common service // Reuse a single struct instead of allocating one for each service on the heap.
// Services used for talking to different parts of the GitHub API.
Actions *ActionsService
Activity *ActivityService
Admin *AdminService
Apps *AppsService
Authorizations *AuthorizationsService
Billing *BillingService
Checks *ChecksService
CodeScanning *CodeScanningService
Enterprise *EnterpriseService
Gists *GistsService
Git *GitService
Gitignores *GitignoresService
Interactions *InteractionsService
IssueImport *IssueImportService
Issues *IssuesService
Licenses *LicensesService
Marketplace *MarketplaceService
Migrations *MigrationService
Organizations *OrganizationsService
Projects *ProjectsService
PullRequests *PullRequestsService
Reactions *ReactionsService
Repositories *RepositoriesService
SCIM *SCIMService
Search *SearchService
Teams *TeamsService
Users *UsersService
}
type service struct {
client *Client
}
// Client returns the http.Client used by this GitHub client.
func (c *Client) Client() *http.Client {
c.clientMu.Lock()
defer c.clientMu.Unlock()
clientCopy := *c.client
return &clientCopy
}
// ListOptions specifies the optional parameters to various List methods that
// support offset pagination.
type ListOptions struct {
// For paginated result sets, page of results to retrieve.
Page int `url:"page,omitempty"`
// For paginated result sets, the number of results to include per page.
PerPage int `url:"per_page,omitempty"`
}
// ListCursorOptions specifies the optional parameters to various List methods that
// support cursor pagination.
type ListCursorOptions struct {
// For paginated result sets, page of results to retrieve.
Page string `url:"page,omitempty"`
// For paginated result sets, the number of results to include per page.
PerPage int `url:"per_page,omitempty"`
// A cursor, as given in the Link header. If specified, the query only searches for events after this cursor.
After string `url:"after,omitempty"`
// A cursor, as given in the Link header. If specified, the query only searches for events before this cursor.
Before string `url:"before,omitempty"`
// A cursor, as given in the Link header. If specified, the query continues the search using this cursor.
Cursor string `url:"cursor,omitempty"`
}
// UploadOptions specifies the parameters to methods that support uploads.
type UploadOptions struct {
Name string `url:"name,omitempty"`
Label string `url:"label,omitempty"`
MediaType string `url:"-"`
}
// RawType represents type of raw format of a request instead of JSON.
type RawType uint8
const (
// Diff format.
Diff RawType = 1 + iota
// Patch format.
Patch
)
// RawOptions specifies parameters when user wants to get raw format of
// a response instead of JSON.
type RawOptions struct {
Type RawType
}
// addOptions adds the parameters in opts as URL query parameters to s. opts
// must be a struct whose fields may contain "url" tags.
func addOptions(s string, opts interface{}) (string, error) {
v := reflect.ValueOf(opts)
if v.Kind() == reflect.Ptr && v.IsNil() {
return s, nil
}
u, err := url.Parse(s)
if err != nil {
return s, err
}
qs, err := query.Values(opts)
if err != nil {
return s, err
}
u.RawQuery = qs.Encode()
return u.String(), nil
}
// NewClient returns a new GitHub API client. If a nil httpClient is
// provided, a new http.Client will be used. To use API methods which require
// authentication, provide an http.Client that will perform the authentication
// for you (such as that provided by the golang.org/x/oauth2 library).
func NewClient(httpClient *http.Client) *Client {
if httpClient == nil {
httpClient = &http.Client{}
}
baseURL, _ := url.Parse(defaultBaseURL)
uploadURL, _ := url.Parse(uploadBaseURL)
c := &Client{client: httpClient, BaseURL: baseURL, UserAgent: userAgent, UploadURL: uploadURL}
c.common.client = c
c.Actions = (*ActionsService)(&c.common)
c.Activity = (*ActivityService)(&c.common)
c.Admin = (*AdminService)(&c.common)
c.Apps = (*AppsService)(&c.common)
c.Authorizations = (*AuthorizationsService)(&c.common)
c.Billing = (*BillingService)(&c.common)
c.Checks = (*ChecksService)(&c.common)
c.CodeScanning = (*CodeScanningService)(&c.common)
c.Enterprise = (*EnterpriseService)(&c.common)
c.Gists = (*GistsService)(&c.common)
c.Git = (*GitService)(&c.common)
c.Gitignores = (*GitignoresService)(&c.common)
c.Interactions = (*InteractionsService)(&c.common)
c.IssueImport = (*IssueImportService)(&c.common)
c.Issues = (*IssuesService)(&c.common)
c.Licenses = (*LicensesService)(&c.common)
c.Marketplace = &MarketplaceService{client: c}
c.Migrations = (*MigrationService)(&c.common)
c.Organizations = (*OrganizationsService)(&c.common)
c.Projects = (*ProjectsService)(&c.common)
c.PullRequests = (*PullRequestsService)(&c.common)
c.Reactions = (*ReactionsService)(&c.common)
c.Repositories = (*RepositoriesService)(&c.common)
c.SCIM = (*SCIMService)(&c.common)
c.Search = (*SearchService)(&c.common)
c.Teams = (*TeamsService)(&c.common)
c.Users = (*UsersService)(&c.common)
return c
}
// NewEnterpriseClient returns a new GitHub API client with provided
// base URL and upload URL (often is your GitHub Enterprise hostname).
// If the base URL does not have the suffix "/api/v3/", it will be added automatically.
// If the upload URL does not have the suffix "/api/uploads", it will be added automatically.
// If a nil httpClient is provided, a new http.Client will be used.
//
// Note that NewEnterpriseClient is a convenience helper only;
// its behavior is equivalent to using NewClient, followed by setting
// the BaseURL and UploadURL fields.
//
// Another important thing is that by default, the GitHub Enterprise URL format
// should be http(s)://[hostname]/api/v3/ or you will always receive the 406 status code.
// The upload URL format should be http(s)://[hostname]/api/uploads/.
func NewEnterpriseClient(baseURL, uploadURL string, httpClient *http.Client) (*Client, error) {
baseEndpoint, err := url.Parse(baseURL)
if err != nil {
return nil, err
}
if !strings.HasSuffix(baseEndpoint.Path, "/") {
baseEndpoint.Path += "/"
}
if !strings.HasSuffix(baseEndpoint.Path, "/api/v3/") &&
!strings.HasPrefix(baseEndpoint.Host, "api.") &&
!strings.Contains(baseEndpoint.Host, ".api.") {
baseEndpoint.Path += "api/v3/"
}
uploadEndpoint, err := url.Parse(uploadURL)
if err != nil {
return nil, err
}
if !strings.HasSuffix(uploadEndpoint.Path, "/") {
uploadEndpoint.Path += "/"
}
if !strings.HasSuffix(uploadEndpoint.Path, "/api/uploads/") &&
!strings.HasPrefix(uploadEndpoint.Host, "api.") &&
!strings.Contains(uploadEndpoint.Host, ".api.") {
uploadEndpoint.Path += "api/uploads/"
}
c := NewClient(httpClient)
c.BaseURL = baseEndpoint
c.UploadURL = uploadEndpoint
return c, nil
}
// NewRequest creates an API request. A relative URL can be provided in urlStr,
// in which case it is resolved relative to the BaseURL of the Client.
// Relative URLs should always be specified without a preceding slash. If
// specified, the value pointed to by body is JSON encoded and included as the
// request body.
func (c *Client) NewRequest(method, urlStr string, body interface{}) (*http.Request, error) {
if !strings.HasSuffix(c.BaseURL.Path, "/") {
return nil, fmt.Errorf("BaseURL must have a trailing slash, but %q does not", c.BaseURL)
}
u, err := c.BaseURL.Parse(urlStr)
if err != nil {
return nil, err
}
var buf io.ReadWriter
if body != nil {
buf = &bytes.Buffer{}
enc := json.NewEncoder(buf)
enc.SetEscapeHTML(false)
err := enc.Encode(body)
if err != nil {
return nil, err
}
}
req, err := http.NewRequest(method, u.String(), buf)
if err != nil {
return nil, err
}
if body != nil {
req.Header.Set("Content-Type", "application/json")
}
req.Header.Set("Accept", mediaTypeV3)
if c.UserAgent != "" {
req.Header.Set("User-Agent", c.UserAgent)
}
return req, nil
}
// NewUploadRequest creates an upload request. A relative URL can be provided in
// urlStr, in which case it is resolved relative to the UploadURL of the Client.
// Relative URLs should always be specified without a preceding slash.
func (c *Client) NewUploadRequest(urlStr string, reader io.Reader, size int64, mediaType string) (*http.Request, error) {
if !strings.HasSuffix(c.UploadURL.Path, "/") {
return nil, fmt.Errorf("UploadURL must have a trailing slash, but %q does not", c.UploadURL)
}
u, err := c.UploadURL.Parse(urlStr)
if err != nil {
return nil, err
}
req, err := http.NewRequest("POST", u.String(), reader)
if err != nil {
return nil, err
}
req.ContentLength = size
if mediaType == "" {
mediaType = defaultMediaType
}
req.Header.Set("Content-Type", mediaType)
req.Header.Set("Accept", mediaTypeV3)
req.Header.Set("User-Agent", c.UserAgent)
return req, nil
}
// Response is a GitHub API response. This wraps the standard http.Response
// returned from GitHub and provides convenient access to things like
// pagination links.
type Response struct {
*http.Response
// These fields provide the page values for paginating through a set of
// results. Any or all of these may be set to the zero value for
// responses that are not part of a paginated set, or for which there
// are no additional pages.
//
// These fields support what is called "offset pagination" and should
// be used with the ListOptions struct.
NextPage int
PrevPage int
FirstPage int
LastPage int
// Additionally, some APIs support "cursor pagination" instead of offset.
// This means that a token points directly to the next record which
// can lead to O(1) performance compared to O(n) performance provided
// by offset pagination.
//
// For APIs that support cursor pagination (such as
// TeamsService.ListIDPGroupsInOrganization), the following field
// will be populated to point to the next page.
//
// To use this token, set ListCursorOptions.Page to this value before
// calling the endpoint again.
NextPageToken string
// For APIs that support cursor pagination, such as RepositoriesService.ListHookDeliveries,
// the following field will be populated to point to the next page.
// Set ListCursorOptions.Cursor to this value when calling the endpoint again.
Cursor string
// For APIs that support before/after pagination, such as OrganizationsService.AuditLog.
Before string
After string
// Explicitly specify the Rate type so Rate's String() receiver doesn't
// propagate to Response.
Rate Rate
// token's expiration date
TokenExpiration Timestamp
}
// newResponse creates a new Response for the provided http.Response.
// r must not be nil.
func newResponse(r *http.Response) *Response {
response := &Response{Response: r}
response.populatePageValues()
response.Rate = parseRate(r)
response.TokenExpiration = parseTokenExpiration(r)
return response
}
// populatePageValues parses the HTTP Link response headers and populates the
// various pagination link values in the Response.
func (r *Response) populatePageValues() {
if links, ok := r.Response.Header["Link"]; ok && len(links) > 0 {
for _, link := range strings.Split(links[0], ",") {
segments := strings.Split(strings.TrimSpace(link), ";")
// link must at least have href and rel
if len(segments) < 2 {
continue
}
// ensure href is properly formatted
if !strings.HasPrefix(segments[0], "<") || !strings.HasSuffix(segments[0], ">") {
continue
}
// try to pull out page parameter
url, err := url.Parse(segments[0][1 : len(segments[0])-1])
if err != nil {
continue
}
q := url.Query()
if cursor := q.Get("cursor"); cursor != "" {
for _, segment := range segments[1:] {
switch strings.TrimSpace(segment) {
case `rel="next"`:
r.Cursor = cursor
}
}
continue
}
page := q.Get("page")
since := q.Get("since")
before := q.Get("before")
after := q.Get("after")
if page == "" && before == "" && after == "" && since == "" {
continue
}
if since != "" && page == "" {
page = since
}
for _, segment := range segments[1:] {
switch strings.TrimSpace(segment) {
case `rel="next"`:
if r.NextPage, err = strconv.Atoi(page); err != nil {
r.NextPageToken = page
}
r.After = after
case `rel="prev"`:
r.PrevPage, _ = strconv.Atoi(page)
r.Before = before
case `rel="first"`:
r.FirstPage, _ = strconv.Atoi(page)
case `rel="last"`:
r.LastPage, _ = strconv.Atoi(page)
}
}
}
}
}
// parseRate parses the rate related headers.
func parseRate(r *http.Response) Rate {
var rate Rate
if limit := r.Header.Get(headerRateLimit); limit != "" {
rate.Limit, _ = strconv.Atoi(limit)
}
if remaining := r.Header.Get(headerRateRemaining); remaining != "" {
rate.Remaining, _ = strconv.Atoi(remaining)
}
if reset := r.Header.Get(headerRateReset); reset != "" {
if v, _ := strconv.ParseInt(reset, 10, 64); v != 0 {
rate.Reset = Timestamp{time.Unix(v, 0)}
}
}
return rate
}
// parseTokenExpiration parses the TokenExpiration related headers.
func parseTokenExpiration(r *http.Response) Timestamp {
var exp Timestamp
if v := r.Header.Get(headerTokenExpiration); v != "" {
if t, err := time.Parse("2006-01-02 03:04:05 MST", v); err == nil {
exp = Timestamp{t.Local()}
}
}
return exp
}
type requestContext uint8
const (
bypassRateLimitCheck requestContext = iota
)
// BareDo sends an API request and lets you handle the api response. If an error
// or API Error occurs, the error will contain more information. Otherwise you
// are supposed to read and close the response's Body. If rate limit is exceeded
// and reset time is in the future, BareDo returns *RateLimitError immediately
// without making a network API call.
//
// The provided ctx must be non-nil, if it is nil an error is returned. If it is
// canceled or times out, ctx.Err() will be returned.
func (c *Client) BareDo(ctx context.Context, req *http.Request) (*Response, error) {
if ctx == nil {
return nil, errNonNilContext
}
req = withContext(ctx, req)
rateLimitCategory := category(req.URL.Path)
if bypass := ctx.Value(bypassRateLimitCheck); bypass == nil {
// If we've hit rate limit, don't make further requests before Reset time.
if err := c.checkRateLimitBeforeDo(req, rateLimitCategory); err != nil {
return &Response{
Response: err.Response,
Rate: err.Rate,
}, err
}
}
resp, err := c.client.Do(req)
if err != nil {
// If we got an error, and the context has been canceled,
// the context's error is probably more useful.
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
// If the error type is *url.Error, sanitize its URL before returning.
if e, ok := err.(*url.Error); ok {
if url, err := url.Parse(e.URL); err == nil {
e.URL = sanitizeURL(url).String()
return nil, e
}
}
return nil, err
}
response := newResponse(resp)
c.rateMu.Lock()
c.rateLimits[rateLimitCategory] = response.Rate
c.rateMu.Unlock()
err = CheckResponse(resp)
if err != nil {
defer resp.Body.Close()
// Special case for AcceptedErrors. If an AcceptedError
// has been encountered, the response's payload will be
// added to the AcceptedError and returned.
//
// Issue #1022
aerr, ok := err.(*AcceptedError)
if ok {
b, readErr := ioutil.ReadAll(resp.Body)
if readErr != nil {
return response, readErr
}
aerr.Raw = b
err = aerr
}
}
return response, err
}
// Do sends an API request and returns the API response. The API response is
// JSON decoded and stored in the value pointed to by v, or returned as an
// error if an API error has occurred. If v implements the io.Writer interface,
// the raw response body will be written to v, without attempting to first
// decode it. If v is nil, and no error hapens, the response is returned as is.
// If rate limit is exceeded and reset time is in the future, Do returns
// *RateLimitError immediately without making a network API call.
//
// The provided ctx must be non-nil, if it is nil an error is returned. If it
// is canceled or times out, ctx.Err() will be returned.
func (c *Client) Do(ctx context.Context, req *http.Request, v interface{}) (*Response, error) {
resp, err := c.BareDo(ctx, req)
if err != nil {
return resp, err
}
defer resp.Body.Close()
switch v := v.(type) {
case nil:
case io.Writer:
_, err = io.Copy(v, resp.Body)
default:
decErr := json.NewDecoder(resp.Body).Decode(v)
if decErr == io.EOF {
decErr = nil // ignore EOF errors caused by empty response body
}
if decErr != nil {
err = decErr
}
}
return resp, err
}
// checkRateLimitBeforeDo does not make any network calls, but uses existing knowledge from
// current client state in order to quickly check if *RateLimitError can be immediately returned
// from Client.Do, and if so, returns it so that Client.Do can skip making a network API call unnecessarily.
// Otherwise it returns nil, and Client.Do should proceed normally.
func (c *Client) checkRateLimitBeforeDo(req *http.Request, rateLimitCategory rateLimitCategory) *RateLimitError {
c.rateMu.Lock()
rate := c.rateLimits[rateLimitCategory]
c.rateMu.Unlock()
if !rate.Reset.Time.IsZero() && rate.Remaining == 0 && time.Now().Before(rate.Reset.Time) {
// Create a fake response.
resp := &http.Response{
Status: http.StatusText(http.StatusForbidden),
StatusCode: http.StatusForbidden,
Request: req,
Header: make(http.Header),
Body: ioutil.NopCloser(strings.NewReader("")),
}
return &RateLimitError{
Rate: rate,
Response: resp,
Message: fmt.Sprintf("API rate limit of %v still exceeded until %v, not making remote request.", rate.Limit, rate.Reset.Time),
}
}
return nil
}
// compareHTTPResponse returns whether two http.Response objects are equal or not.
// Currently, only StatusCode is checked. This function is used when implementing the
// Is(error) bool interface for the custom error types in this package.
func compareHTTPResponse(r1, r2 *http.Response) bool {
if r1 == nil && r2 == nil {
return true
}
if r1 != nil && r2 != nil {
return r1.StatusCode == r2.StatusCode
}
return false
}
/*
An ErrorResponse reports one or more errors caused by an API request.
GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/#client-errors
*/
type ErrorResponse struct {
Response *http.Response // HTTP response that caused this error
Message string `json:"message"` // error message
Errors []Error `json:"errors"` // more detail on individual errors
// Block is only populated on certain types of errors such as code 451.
Block *ErrorBlock `json:"block,omitempty"`
// Most errors will also include a documentation_url field pointing
// to some content that might help you resolve the error, see
// https://docs.github.com/en/free-pro-team@latest/rest/reference/#client-errors
DocumentationURL string `json:"documentation_url,omitempty"`
}
// ErrorBlock contains a further explanation for the reason of an error.
// See https://developer.github.com/changes/2016-03-17-the-451-status-code-is-now-supported/
// for more information.
type ErrorBlock struct {
Reason string `json:"reason,omitempty"`
CreatedAt *Timestamp `json:"created_at,omitempty"`
}
func (r *ErrorResponse) Error() string {
return fmt.Sprintf("%v %v: %d %v %+v",
r.Response.Request.Method, sanitizeURL(r.Response.Request.URL),
r.Response.StatusCode, r.Message, r.Errors)
}
// Is returns whether the provided error equals this error.
func (r *ErrorResponse) Is(target error) bool {
v, ok := target.(*ErrorResponse)
if !ok {
return false
}
if r.Message != v.Message || (r.DocumentationURL != v.DocumentationURL) ||
!compareHTTPResponse(r.Response, v.Response) {
return false
}
// Compare Errors.
if len(r.Errors) != len(v.Errors) {
return false
}
for idx := range r.Errors {
if r.Errors[idx] != v.Errors[idx] {
return false
}
}
// Compare Block.
if (r.Block != nil && v.Block == nil) || (r.Block == nil && v.Block != nil) {
return false
}
if r.Block != nil && v.Block != nil {
if r.Block.Reason != v.Block.Reason {
return false
}
if (r.Block.CreatedAt != nil && v.Block.CreatedAt == nil) || (r.Block.CreatedAt ==
nil && v.Block.CreatedAt != nil) {
return false
}
if r.Block.CreatedAt != nil && v.Block.CreatedAt != nil {
if *(r.Block.CreatedAt) != *(v.Block.CreatedAt) {
return false
}
}
}
return true
}
// TwoFactorAuthError occurs when using HTTP Basic Authentication for a user
// that has two-factor authentication enabled. The request can be reattempted
// by providing a one-time password in the request.
type TwoFactorAuthError ErrorResponse
func (r *TwoFactorAuthError) Error() string { return (*ErrorResponse)(r).Error() }
// RateLimitError occurs when GitHub returns 403 Forbidden response with a rate limit
// remaining value of 0.
type RateLimitError struct {
Rate Rate // Rate specifies last known rate limit for the client
Response *http.Response // HTTP response that caused this error
Message string `json:"message"` // error message
}
func (r *RateLimitError) Error() string {
return fmt.Sprintf("%v %v: %d %v %v",
r.Response.Request.Method, sanitizeURL(r.Response.Request.URL),
r.Response.StatusCode, r.Message, formatRateReset(time.Until(r.Rate.Reset.Time)))
}
// Is returns whether the provided error equals this error.
func (r *RateLimitError) Is(target error) bool {
v, ok := target.(*RateLimitError)
if !ok {
return false
}
return r.Rate == v.Rate &&
r.Message == v.Message &&
compareHTTPResponse(r.Response, v.Response)
}
// AcceptedError occurs when GitHub returns 202 Accepted response with an
// empty body, which means a job was scheduled on the GitHub side to process
// the information needed and cache it.
// Technically, 202 Accepted is not a real error, it's just used to
// indicate that results are not ready yet, but should be available soon.
// The request can be repeated after some time.
type AcceptedError struct {
// Raw contains the response body.
Raw []byte
}
func (*AcceptedError) Error() string {
return "job scheduled on GitHub side; try again later"
}
// Is returns whether the provided error equals this error.
func (ae *AcceptedError) Is(target error) bool {
v, ok := target.(*AcceptedError)
if !ok {
return false
}
return bytes.Compare(ae.Raw, v.Raw) == 0
}
// AbuseRateLimitError occurs when GitHub returns 403 Forbidden response with the
// "documentation_url" field value equal to "https://docs.github.com/en/free-pro-team@latest/rest/overview/resources-in-the-rest-api#secondary-rate-limits".
type AbuseRateLimitError struct {
Response *http.Response // HTTP response that caused this error
Message string `json:"message"` // error message
// RetryAfter is provided with some abuse rate limit errors. If present,
// it is the amount of time that the client should wait before retrying.
// Otherwise, the client should try again later (after an unspecified amount of time).
RetryAfter *time.Duration
}
func (r *AbuseRateLimitError) Error() string {
return fmt.Sprintf("%v %v: %d %v",
r.Response.Request.Method, sanitizeURL(r.Response.Request.URL),
r.Response.StatusCode, r.Message)
}
// Is returns whether the provided error equals this error.
func (r *AbuseRateLimitError) Is(target error) bool {
v, ok := target.(*AbuseRateLimitError)
if !ok {
return false
}
return r.Message == v.Message &&
r.RetryAfter == v.RetryAfter &&
compareHTTPResponse(r.Response, v.Response)
}
// sanitizeURL redacts the client_secret parameter from the URL which may be
// exposed to the user.
func sanitizeURL(uri *url.URL) *url.URL {
if uri == nil {
return nil
}
params := uri.Query()
if len(params.Get("client_secret")) > 0 {
params.Set("client_secret", "REDACTED")
uri.RawQuery = params.Encode()
}
return uri
}
/*
An Error reports more details on an individual error in an ErrorResponse.
These are the possible validation error codes:
missing:
resource does not exist
missing_field:
a required field on a resource has not been set
invalid:
the formatting of a field is invalid
already_exists:
another resource has the same valid as this field
custom:
some resources return this (e.g. github.User.CreateKey()), additional
information is set in the Message field of the Error
GitHub error responses structure are often undocumented and inconsistent.
Sometimes error is just a simple string (Issue #540).
In such cases, Message represents an error message as a workaround.
GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/#client-errors
*/
type Error struct {
Resource string `json:"resource"` // resource on which the error occurred
Field string `json:"field"` // field on which the error occurred
Code string `json:"code"` // validation error code
Message string `json:"message"` // Message describing the error. Errors with Code == "custom" will always have this set.
}
func (e *Error) Error() string {
return fmt.Sprintf("%v error caused by %v field on %v resource",
e.Code, e.Field, e.Resource)
}
func (e *Error) UnmarshalJSON(data []byte) error {
type aliasError Error // avoid infinite recursion by using type alias.
if err := json.Unmarshal(data, (*aliasError)(e)); err != nil {
return json.Unmarshal(data, &e.Message) // data can be json string.
}
return nil
}
// CheckResponse checks the API response for errors, and returns them if
// present. A response is considered an error if it has a status code outside
// the 200 range or equal to 202 Accepted.
// API error responses are expected to have response
// body, and a JSON response body that maps to ErrorResponse.
//
// The error type will be *RateLimitError for rate limit exceeded errors,
// *AcceptedError for 202 Accepted status codes,
// and *TwoFactorAuthError for two-factor authentication errors.
func CheckResponse(r *http.Response) error {
if r.StatusCode == http.StatusAccepted {
return &AcceptedError{}
}
if c := r.StatusCode; 200 <= c && c <= 299 {
return nil
}
errorResponse := &ErrorResponse{Response: r}
data, err := ioutil.ReadAll(r.Body)
if err == nil && data != nil {
json.Unmarshal(data, errorResponse)
}
// Re-populate error response body because GitHub error responses are often
// undocumented and inconsistent.
// Issue #1136, #540.
r.Body = ioutil.NopCloser(bytes.NewBuffer(data))
switch {
case r.StatusCode == http.StatusUnauthorized && strings.HasPrefix(r.Header.Get(headerOTP), "required"):
return (*TwoFactorAuthError)(errorResponse)
case r.StatusCode == http.StatusForbidden && r.Header.Get(headerRateRemaining) == "0":
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