mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-28 22:14:20 -04:00
431 lines
12 KiB
Go
431 lines
12 KiB
Go
// Copyright 2016 The Gogs Authors. All rights reserved.
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package context
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import (
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"context"
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"fmt"
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"html"
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"net/http"
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"net/url"
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"strings"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/models/login"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/web/middleware"
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"code.gitea.io/gitea/services/auth"
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"gitea.com/go-chi/session"
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)
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// APIContext is a specific context for API service
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type APIContext struct {
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*Context
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Org *APIOrganization
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}
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// APIError is error format response
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// swagger:response error
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type APIError struct {
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Message string `json:"message"`
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URL string `json:"url"`
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}
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// APIValidationError is error format response related to input validation
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// swagger:response validationError
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type APIValidationError struct {
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Message string `json:"message"`
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URL string `json:"url"`
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}
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// APIInvalidTopicsError is error format response to invalid topics
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// swagger:response invalidTopicsError
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type APIInvalidTopicsError struct {
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Topics []string `json:"invalidTopics"`
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Message string `json:"message"`
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}
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//APIEmpty is an empty response
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// swagger:response empty
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type APIEmpty struct{}
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//APIForbiddenError is a forbidden error response
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// swagger:response forbidden
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type APIForbiddenError struct {
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APIError
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}
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//APINotFound is a not found empty response
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// swagger:response notFound
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type APINotFound struct{}
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//APIConflict is a conflict empty response
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// swagger:response conflict
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type APIConflict struct{}
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//APIRedirect is a redirect response
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// swagger:response redirect
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type APIRedirect struct{}
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//APIString is a string response
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// swagger:response string
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type APIString string
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// ServerError responds with error message, status is 500
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func (ctx *APIContext) ServerError(title string, err error) {
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ctx.Error(http.StatusInternalServerError, title, err)
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}
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// Error responds with an error message to client with given obj as the message.
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// If status is 500, also it prints error to log.
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func (ctx *APIContext) Error(status int, title string, obj interface{}) {
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var message string
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if err, ok := obj.(error); ok {
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message = err.Error()
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} else {
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message = fmt.Sprintf("%s", obj)
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}
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if status == http.StatusInternalServerError {
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log.ErrorWithSkip(1, "%s: %s", title, message)
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if setting.IsProd && !(ctx.User != nil && ctx.User.IsAdmin) {
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message = ""
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}
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}
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ctx.JSON(status, APIError{
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Message: message,
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URL: setting.API.SwaggerURL,
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})
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}
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// InternalServerError responds with an error message to the client with the error as a message
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// and the file and line of the caller.
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func (ctx *APIContext) InternalServerError(err error) {
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log.ErrorWithSkip(1, "InternalServerError: %v", err)
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var message string
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if !setting.IsProd || (ctx.User != nil && ctx.User.IsAdmin) {
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message = err.Error()
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}
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ctx.JSON(http.StatusInternalServerError, APIError{
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Message: message,
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URL: setting.API.SwaggerURL,
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})
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}
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var (
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apiContextKey interface{} = "default_api_context"
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)
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// WithAPIContext set up api context in request
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func WithAPIContext(req *http.Request, ctx *APIContext) *http.Request {
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return req.WithContext(context.WithValue(req.Context(), apiContextKey, ctx))
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}
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// GetAPIContext returns a context for API routes
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func GetAPIContext(req *http.Request) *APIContext {
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return req.Context().Value(apiContextKey).(*APIContext)
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}
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func genAPILinks(curURL *url.URL, total, pageSize, curPage int) []string {
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page := NewPagination(total, pageSize, curPage, 0)
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paginater := page.Paginater
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links := make([]string, 0, 4)
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if paginater.HasNext() {
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u := *curURL
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queries := u.Query()
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queries.Set("page", fmt.Sprintf("%d", paginater.Next()))
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u.RawQuery = queries.Encode()
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links = append(links, fmt.Sprintf("<%s%s>; rel=\"next\"", setting.AppURL, u.RequestURI()[1:]))
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}
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if !paginater.IsLast() {
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u := *curURL
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queries := u.Query()
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queries.Set("page", fmt.Sprintf("%d", paginater.TotalPages()))
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u.RawQuery = queries.Encode()
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links = append(links, fmt.Sprintf("<%s%s>; rel=\"last\"", setting.AppURL, u.RequestURI()[1:]))
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}
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if !paginater.IsFirst() {
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u := *curURL
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queries := u.Query()
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queries.Set("page", "1")
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u.RawQuery = queries.Encode()
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links = append(links, fmt.Sprintf("<%s%s>; rel=\"first\"", setting.AppURL, u.RequestURI()[1:]))
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}
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if paginater.HasPrevious() {
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u := *curURL
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queries := u.Query()
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queries.Set("page", fmt.Sprintf("%d", paginater.Previous()))
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u.RawQuery = queries.Encode()
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links = append(links, fmt.Sprintf("<%s%s>; rel=\"prev\"", setting.AppURL, u.RequestURI()[1:]))
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}
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return links
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}
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// SetLinkHeader sets pagination link header by given total number and page size.
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func (ctx *APIContext) SetLinkHeader(total, pageSize int) {
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links := genAPILinks(ctx.Req.URL, total, pageSize, ctx.FormInt("page"))
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if len(links) > 0 {
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ctx.Header().Set("Link", strings.Join(links, ","))
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ctx.AppendAccessControlExposeHeaders("Link")
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}
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}
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// SetTotalCountHeader set "X-Total-Count" header
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func (ctx *APIContext) SetTotalCountHeader(total int64) {
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ctx.Header().Set("X-Total-Count", fmt.Sprint(total))
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ctx.AppendAccessControlExposeHeaders("X-Total-Count")
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}
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// AppendAccessControlExposeHeaders append headers by name to "Access-Control-Expose-Headers" header
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func (ctx *APIContext) AppendAccessControlExposeHeaders(names ...string) {
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val := ctx.Header().Get("Access-Control-Expose-Headers")
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if len(val) != 0 {
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ctx.Header().Set("Access-Control-Expose-Headers", fmt.Sprintf("%s, %s", val, strings.Join(names, ", ")))
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} else {
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ctx.Header().Set("Access-Control-Expose-Headers", strings.Join(names, ", "))
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}
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}
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// RequireCSRF requires a validated a CSRF token
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func (ctx *APIContext) RequireCSRF() {
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headerToken := ctx.Req.Header.Get(ctx.csrf.GetHeaderName())
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formValueToken := ctx.Req.FormValue(ctx.csrf.GetFormName())
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if len(headerToken) > 0 || len(formValueToken) > 0 {
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Validate(ctx.Context, ctx.csrf)
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} else {
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ctx.Context.Error(401, "Missing CSRF token.")
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}
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}
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// CheckForOTP validates OTP
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func (ctx *APIContext) CheckForOTP() {
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if skip, ok := ctx.Data["SkipLocalTwoFA"]; ok && skip.(bool) {
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return // Skip 2FA
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}
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otpHeader := ctx.Req.Header.Get("X-Gitea-OTP")
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twofa, err := login.GetTwoFactorByUID(ctx.Context.User.ID)
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if err != nil {
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if login.IsErrTwoFactorNotEnrolled(err) {
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return // No 2FA enrollment for this user
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}
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ctx.Context.Error(http.StatusInternalServerError)
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return
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}
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ok, err := twofa.ValidateTOTP(otpHeader)
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if err != nil {
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ctx.Context.Error(http.StatusInternalServerError)
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return
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}
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if !ok {
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ctx.Context.Error(401)
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return
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}
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}
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// APIAuth converts auth.Auth as a middleware
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func APIAuth(authMethod auth.Method) func(*APIContext) {
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return func(ctx *APIContext) {
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// Get user from session if logged in.
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ctx.User = authMethod.Verify(ctx.Req, ctx.Resp, ctx, ctx.Session)
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if ctx.User != nil {
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ctx.IsBasicAuth = ctx.Data["AuthedMethod"].(string) == new(auth.Basic).Name()
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ctx.IsSigned = true
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ctx.Data["IsSigned"] = ctx.IsSigned
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ctx.Data["SignedUser"] = ctx.User
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ctx.Data["SignedUserID"] = ctx.User.ID
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ctx.Data["SignedUserName"] = ctx.User.Name
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ctx.Data["IsAdmin"] = ctx.User.IsAdmin
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} else {
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ctx.Data["SignedUserID"] = int64(0)
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ctx.Data["SignedUserName"] = ""
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}
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}
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}
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// APIContexter returns apicontext as middleware
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func APIContexter() func(http.Handler) http.Handler {
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var csrfOpts = getCsrfOpts()
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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var locale = middleware.Locale(w, req)
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var ctx = APIContext{
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Context: &Context{
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Resp: NewResponse(w),
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Data: map[string]interface{}{},
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Locale: locale,
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Session: session.GetSession(req),
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Repo: &Repository{
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PullRequest: &PullRequest{},
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},
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Org: &Organization{},
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},
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Org: &APIOrganization{},
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}
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ctx.Req = WithAPIContext(WithContext(req, ctx.Context), &ctx)
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ctx.csrf = Csrfer(csrfOpts, ctx.Context)
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// If request sends files, parse them here otherwise the Query() can't be parsed and the CsrfToken will be invalid.
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if ctx.Req.Method == "POST" && strings.Contains(ctx.Req.Header.Get("Content-Type"), "multipart/form-data") {
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if err := ctx.Req.ParseMultipartForm(setting.Attachment.MaxSize << 20); err != nil && !strings.Contains(err.Error(), "EOF") { // 32MB max size
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ctx.InternalServerError(err)
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return
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}
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}
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ctx.Resp.Header().Set(`X-Frame-Options`, setting.CORSConfig.XFrameOptions)
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ctx.Data["CsrfToken"] = html.EscapeString(ctx.csrf.GetToken())
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next.ServeHTTP(ctx.Resp, ctx.Req)
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// Handle adding signedUserName to the context for the AccessLogger
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usernameInterface := ctx.Data["SignedUserName"]
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identityPtrInterface := ctx.Req.Context().Value(signedUserNameStringPointerKey)
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if usernameInterface != nil && identityPtrInterface != nil {
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username := usernameInterface.(string)
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identityPtr := identityPtrInterface.(*string)
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if identityPtr != nil && username != "" {
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*identityPtr = username
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}
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}
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})
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}
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}
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// ReferencesGitRepo injects the GitRepo into the Context
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func ReferencesGitRepo(allowEmpty bool) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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ctx := GetAPIContext(req)
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// Empty repository does not have reference information.
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if !allowEmpty && ctx.Repo.Repository.IsEmpty {
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return
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}
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// For API calls.
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if ctx.Repo.GitRepo == nil {
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repoPath := models.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
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gitRepo, err := git.OpenRepository(repoPath)
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if err != nil {
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ctx.Error(http.StatusInternalServerError, "RepoRef Invalid repo "+repoPath, err)
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return
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}
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ctx.Repo.GitRepo = gitRepo
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// We opened it, we should close it
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defer func() {
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// If it's been set to nil then assume someone else has closed it.
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if ctx.Repo.GitRepo != nil {
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ctx.Repo.GitRepo.Close()
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}
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}()
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}
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next.ServeHTTP(w, req)
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})
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}
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}
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// NotFound handles 404s for APIContext
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// String will replace message, errors will be added to a slice
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func (ctx *APIContext) NotFound(objs ...interface{}) {
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var message = "Not Found"
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var errors []string
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for _, obj := range objs {
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// Ignore nil
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if obj == nil {
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continue
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}
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if err, ok := obj.(error); ok {
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errors = append(errors, err.Error())
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} else {
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message = obj.(string)
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}
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}
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ctx.JSON(http.StatusNotFound, map[string]interface{}{
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"message": message,
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"documentation_url": setting.API.SwaggerURL,
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"errors": errors,
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})
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}
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// RepoRefForAPI handles repository reference names when the ref name is not explicitly given
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func RepoRefForAPI(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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ctx := GetAPIContext(req)
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// Empty repository does not have reference information.
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if ctx.Repo.Repository.IsEmpty {
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return
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}
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var err error
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if ctx.Repo.GitRepo == nil {
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repoPath := models.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
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ctx.Repo.GitRepo, err = git.OpenRepository(repoPath)
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if err != nil {
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ctx.InternalServerError(err)
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return
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}
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// We opened it, we should close it
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defer func() {
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// If it's been set to nil then assume someone else has closed it.
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if ctx.Repo.GitRepo != nil {
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ctx.Repo.GitRepo.Close()
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}
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}()
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}
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refName := getRefName(ctx.Context, RepoRefAny)
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if ctx.Repo.GitRepo.IsBranchExist(refName) {
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ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetBranchCommit(refName)
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if err != nil {
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ctx.InternalServerError(err)
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return
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}
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ctx.Repo.CommitID = ctx.Repo.Commit.ID.String()
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} else if ctx.Repo.GitRepo.IsTagExist(refName) {
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ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetTagCommit(refName)
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if err != nil {
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ctx.InternalServerError(err)
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return
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}
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ctx.Repo.CommitID = ctx.Repo.Commit.ID.String()
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} else if len(refName) == 40 {
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ctx.Repo.CommitID = refName
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ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetCommit(refName)
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if err != nil {
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ctx.NotFound("GetCommit", err)
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return
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}
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} else {
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ctx.NotFound(fmt.Errorf("not exist: '%s'", ctx.Params("*")))
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return
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}
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next.ServeHTTP(w, req)
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})
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}
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