Further clean up the request handling after talking with Asaf
This commit is contained in:
parent
98da461d92
commit
7a01ddae66
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@ -28,11 +28,11 @@ type LandingPagePost struct {
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HasRead bool
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}
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func (s *websiteRoutes) Index(c *RequestContext) ResponseData {
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func Index(c *RequestContext) ResponseData {
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const maxPosts = 5
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const numProjectsToGet = 7
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iterProjects, err := db.Query(c.Context(), s.conn, models.Project{},
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iterProjects, err := db.Query(c.Context(), c.Conn, models.Project{},
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"SELECT $columns FROM handmade_project WHERE flags = 0 OR id = $1",
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models.HMNProjectID,
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)
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@ -54,7 +54,7 @@ func (s *websiteRoutes) Index(c *RequestContext) ResponseData {
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}
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memberId := 3 // TODO: NO
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projectPostIter, err := db.Query(c.Context(), s.conn, ProjectPost{},
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projectPostIter, err := db.Query(c.Context(), c.Conn, ProjectPost{},
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`
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SELECT $columns
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FROM
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@ -116,7 +116,7 @@ func (s *websiteRoutes) Index(c *RequestContext) ResponseData {
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type newsThreadQuery struct {
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Thread models.Thread `db:"thread"`
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}
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newsThreadRow, err := db.QueryOne(c.Context(), s.conn, newsThreadQuery{},
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newsThreadRow, err := db.QueryOne(c.Context(), c.Conn, newsThreadQuery{},
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`
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SELECT $columns
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FROM
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@ -135,11 +135,11 @@ func (s *websiteRoutes) Index(c *RequestContext) ResponseData {
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newsThread := newsThreadRow.(*newsThreadQuery)
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_ = newsThread // TODO: NO
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baseData := s.getBaseData(c)
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baseData := getBaseData(c)
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baseData.BodyClasses = append(baseData.BodyClasses, "hmdev", "landing") // TODO: Is "hmdev" necessary any more?
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var res ResponseData
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err = res.WriteTemplate("index.html", s.getBaseData(c))
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err = res.WriteTemplate("index.html", getBaseData(c))
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if err != nil {
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panic(err)
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}
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@ -13,56 +13,28 @@ import (
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"git.handmade.network/hmn/hmn/src/logging"
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"git.handmade.network/hmn/hmn/src/models"
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"git.handmade.network/hmn/hmn/src/templates"
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"github.com/jackc/pgx/v4/pgxpool"
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"github.com/julienschmidt/httprouter"
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"github.com/rs/zerolog"
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)
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type HMNRouter struct {
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HttpRouter *httprouter.Router
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Wrappers []HMNHandlerWrapper
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}
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func (r *HMNRouter) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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r.HttpRouter.ServeHTTP(rw, req)
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}
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func (r *HMNRouter) WrapHandler(handler HMNHandler) HMNHandler {
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for i := len(r.Wrappers) - 1; i >= 0; i-- {
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handler = r.Wrappers[i](handler)
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}
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return handler
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}
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func (r *HMNRouter) Handle(method, route string, handler HMNHandler) {
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h := r.WrapHandler(handler)
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r.HttpRouter.Handle(method, route, func(rw http.ResponseWriter, req *http.Request, p httprouter.Params) {
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c := NewRequestContext(rw, req, p)
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doRequest(rw, c, h)
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})
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}
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func (r *HMNRouter) GET(route string, handler HMNHandler) {
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r.Handle(http.MethodGet, route, handler)
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}
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func (r *HMNRouter) POST(route string, handler HMNHandler) {
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r.Handle(http.MethodPost, route, handler)
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}
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// TODO: More methods
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func (r *HMNRouter) ServeFiles(path string, root http.FileSystem) {
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r.HttpRouter.ServeFiles(path, root)
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}
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func (r *HMNRouter) WithWrappers(wrappers ...HMNHandlerWrapper) *HMNRouter {
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result := *r
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result.Wrappers = append(result.Wrappers, wrappers...)
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return &result
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}
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// The typical handler. Handles a request and returns data about the response.
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type HMNHandler func(c *RequestContext) ResponseData
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type HMNHandlerWrapper func(h HMNHandler) HMNHandler
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// A special handler that runs before the primary handler. Intended to set
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// information on the context for later handlers, or to give the request a
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// means to bail out early if preconditions are not met (like auth). If `ok`
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// is false, the request will immediately bail out, no further handlers will
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// be run, and it will respond with the provided response data.
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//
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// The response data from this function will still be fed through any after
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// handlers, to ensure that errors will get logged and whatnot.
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type HMNBeforeHandler func(c *RequestContext) (ok bool, res ResponseData)
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// A special handler that runs after the primary handler and can modify the
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// response information. Intended for error logging, error pages,
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// cleanup, etc.
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type HMNAfterHandler func(c *RequestContext, res ResponseData) ResponseData
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func (h HMNHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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c := NewRequestContext(rw, req, nil)
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@ -74,6 +46,7 @@ type RequestContext struct {
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Req *http.Request
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PathParams httprouter.Params
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Conn *pgxpool.Pool
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CurrentProject *models.Project
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CurrentUser *models.User
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// CurrentMember *models.Member
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@ -104,34 +77,6 @@ func (c *RequestContext) GetFormValues() (url.Values, error) {
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return c.Req.PostForm, nil
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}
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type ResponseData struct {
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StatusCode int
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Body *bytes.Buffer
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Errors []error
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header http.Header
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}
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func (rd *ResponseData) Headers() http.Header {
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if rd.header == nil {
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rd.header = make(http.Header)
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}
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return rd.header
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}
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func (rd *ResponseData) Write(p []byte) (n int, err error) {
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if rd.Body == nil {
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rd.Body = new(bytes.Buffer)
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}
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return rd.Body.Write(p)
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}
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func (rd *ResponseData) SetCookie(cookie *http.Cookie) {
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rd.Headers().Add("Set-Cookie", cookie.String())
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}
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// The logic of this function is copy-pasted from the Go standard library.
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// https://golang.org/pkg/net/http/#Redirect
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func (c *RequestContext) Redirect(dest string, code int) ResponseData {
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@ -189,10 +134,88 @@ func (c *RequestContext) Redirect(dest string, code int) ResponseData {
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return res
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}
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type ResponseData struct {
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StatusCode int
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Body *bytes.Buffer
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Errors []error
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header http.Header
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}
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func (rd *ResponseData) Headers() http.Header {
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if rd.header == nil {
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rd.header = make(http.Header)
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}
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return rd.header
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}
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func (rd *ResponseData) Write(p []byte) (n int, err error) {
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if rd.Body == nil {
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rd.Body = new(bytes.Buffer)
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}
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return rd.Body.Write(p)
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}
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func (rd *ResponseData) SetCookie(cookie *http.Cookie) {
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rd.Headers().Add("Set-Cookie", cookie.String())
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}
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func (rd *ResponseData) WriteTemplate(name string, data interface{}) error {
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return templates.Templates[name].Execute(rd, data)
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}
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type RouteBuilder struct {
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Router *httprouter.Router
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BeforeHandlers []HMNBeforeHandler
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AfterHandlers []HMNAfterHandler
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}
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func (b RouteBuilder) ChainHandlers(h HMNHandler) HMNHandler {
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return func(c *RequestContext) ResponseData {
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beforeOk := true
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var res ResponseData
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for _, before := range b.BeforeHandlers {
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if ok, errorRes := before(c); !ok {
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beforeOk = false
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res = errorRes
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}
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}
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if beforeOk {
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res = h(c)
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}
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for _, after := range b.AfterHandlers {
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res = after(c, res)
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}
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return res
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}
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}
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func (b *RouteBuilder) Handle(method, route string, handler HMNHandler) {
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h := b.ChainHandlers(handler)
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b.Router.Handle(method, route, func(rw http.ResponseWriter, req *http.Request, p httprouter.Params) {
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c := NewRequestContext(rw, req, p)
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doRequest(rw, c, h)
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})
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}
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func (b *RouteBuilder) GET(route string, handler HMNHandler) {
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b.Handle(http.MethodGet, route, handler)
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}
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func (b *RouteBuilder) POST(route string, handler HMNHandler) {
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b.Handle(http.MethodPost, route, handler)
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}
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// TODO: More methods
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func (b *RouteBuilder) ServeFiles(path string, root http.FileSystem) {
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b.Router.ServeFiles(path, root)
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}
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func ErrorResponse(status int, errs ...error) ResponseData {
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return ResponseData{
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StatusCode: status,
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@ -18,44 +18,67 @@ import (
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"github.com/julienschmidt/httprouter"
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)
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type websiteRoutes struct {
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*HMNRouter
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conn *pgxpool.Pool
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}
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func NewWebsiteRoutes(conn *pgxpool.Pool) http.Handler {
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routes := &websiteRoutes{
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HMNRouter: &HMNRouter{
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HttpRouter: httprouter.New(),
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Wrappers: []HMNHandlerWrapper{ErrorLoggingWrapper},
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router := httprouter.New()
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routes := RouteBuilder{
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Router: router,
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BeforeHandlers: []HMNBeforeHandler{
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func(c *RequestContext) (bool, ResponseData) {
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c.Conn = conn
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return true, ResponseData{}
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},
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},
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conn: conn,
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AfterHandlers: []HMNAfterHandler{ErrorLoggingHandler},
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}
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mainRoutes := routes.WithWrappers(routes.CommonWebsiteDataWrapper)
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routes.POST("/login", Login)
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routes.GET("/logout", Logout)
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routes.ServeFiles("/public/*filepath", http.Dir("public"))
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mainRoutes := routes
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mainRoutes.BeforeHandlers = append(mainRoutes.BeforeHandlers,
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CommonWebsiteDataWrapper,
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)
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mainRoutes.GET("/", func(c *RequestContext) ResponseData {
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if c.CurrentProject.ID == models.HMNProjectID {
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return routes.Index(c)
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return Index(c)
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} else {
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// TODO: Return the project landing page
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panic("route not implemented")
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}
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})
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mainRoutes.GET("/project/:id", routes.Project)
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mainRoutes.GET("/assets/project.css", routes.ProjectCSS)
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mainRoutes.GET("/project/:id", Project)
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mainRoutes.GET("/assets/project.css", ProjectCSS)
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routes.POST("/login", routes.Login)
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routes.GET("/logout", routes.Logout)
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router.NotFound = mainRoutes.ChainHandlers(FourOhFour)
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routes.ServeFiles("/public/*filepath", http.Dir("public"))
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adminRoutes := routes
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adminRoutes.BeforeHandlers = append(adminRoutes.BeforeHandlers,
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func(c *RequestContext) (ok bool, res ResponseData) {
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return false, ResponseData{
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StatusCode: http.StatusUnauthorized,
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Body: bytes.NewBufferString("No one is allowed!\n"),
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}
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},
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)
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adminRoutes.AfterHandlers = append(adminRoutes.AfterHandlers,
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func(c *RequestContext, res ResponseData) ResponseData {
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res.Body.WriteString("Now go away. Sincerely, the after handler.\n")
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return res
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},
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)
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routes.HttpRouter.NotFound = mainRoutes.WrapHandler(routes.FourOhFour)
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adminRoutes.GET("/admin", func(c *RequestContext) ResponseData {
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return ResponseData{
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Body: bytes.NewBufferString("Here are all the secrets.\n"),
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}
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})
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return routes
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return router
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}
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func (s *websiteRoutes) getBaseData(c *RequestContext) templates.BaseData {
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func getBaseData(c *RequestContext) templates.BaseData {
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var templateUser *templates.User
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if c.CurrentUser != nil {
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templateUser = &templates.User{
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@ -106,9 +129,9 @@ func FetchProjectBySlug(ctx context.Context, conn *pgxpool.Pool, slug string) (*
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return defaultProject, nil
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}
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func (s *websiteRoutes) Project(c *RequestContext) ResponseData {
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func Project(c *RequestContext) ResponseData {
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id := c.PathParams.ByName("id")
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row := s.conn.QueryRow(context.Background(), "SELECT name FROM handmade_project WHERE id = $1", c.PathParams.ByName("id"))
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row := c.Conn.QueryRow(context.Background(), "SELECT name FROM handmade_project WHERE id = $1", c.PathParams.ByName("id"))
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var name string
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err := row.Scan(&name)
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if err != nil {
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@ -121,7 +144,7 @@ func (s *websiteRoutes) Project(c *RequestContext) ResponseData {
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return res
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}
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func (s *websiteRoutes) ProjectCSS(c *RequestContext) ResponseData {
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func ProjectCSS(c *RequestContext) ResponseData {
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color := c.URL().Query().Get("color")
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if color == "" {
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return ErrorResponse(http.StatusBadRequest, NewSafeError(nil, "You must provide a 'color' parameter.\n"))
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@ -145,7 +168,7 @@ func (s *websiteRoutes) ProjectCSS(c *RequestContext) ResponseData {
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return res
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}
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func (s *websiteRoutes) Login(c *RequestContext) ResponseData {
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func Login(c *RequestContext) ResponseData {
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// TODO: Update this endpoint to give uniform responses on errors and to be resilient to timing attacks.
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form, err := c.GetFormValues()
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@ -164,7 +187,7 @@ func (s *websiteRoutes) Login(c *RequestContext) ResponseData {
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redirect = "/"
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}
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userRow, err := db.QueryOne(c.Context(), s.conn, models.User{}, "SELECT $columns FROM auth_user WHERE username = $1", username)
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userRow, err := db.QueryOne(c.Context(), c.Conn, models.User{}, "SELECT $columns FROM auth_user WHERE username = $1", username)
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if err != nil {
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if errors.Is(err, db.ErrNoMatchingRows) {
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return ResponseData{
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@ -191,7 +214,7 @@ func (s *websiteRoutes) Login(c *RequestContext) ResponseData {
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if hashed.IsOutdated() {
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newHashed, err := auth.HashPassword(password)
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if err == nil {
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err := auth.UpdatePassword(c.Context(), s.conn, username, newHashed)
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err := auth.UpdatePassword(c.Context(), c.Conn, username, newHashed)
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if err != nil {
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c.Logger.Error().Err(err).Msg("failed to update user's password")
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}
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@ -201,7 +224,7 @@ func (s *websiteRoutes) Login(c *RequestContext) ResponseData {
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// If errors happen here, we can still continue with logging them in
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}
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session, err := auth.CreateSession(c.Context(), s.conn, username)
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session, err := auth.CreateSession(c.Context(), c.Conn, username)
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if err != nil {
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return ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to create session"))
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}
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@ -215,11 +238,11 @@ func (s *websiteRoutes) Login(c *RequestContext) ResponseData {
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}
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}
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func (s *websiteRoutes) Logout(c *RequestContext) ResponseData {
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func Logout(c *RequestContext) ResponseData {
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sessionCookie, err := c.Req.Cookie(auth.SessionCookieName)
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if err == nil {
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// clear the session from the db immediately, no expiration
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err := auth.DeleteSession(c.Context(), s.conn, sessionCookie.Value)
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err := auth.DeleteSession(c.Context(), c.Conn, sessionCookie.Value)
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if err != nil {
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logging.Error().Err(err).Msg("failed to delete session on logout")
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}
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@ -231,64 +254,58 @@ func (s *websiteRoutes) Logout(c *RequestContext) ResponseData {
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return res
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}
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func (s *websiteRoutes) FourOhFour(c *RequestContext) ResponseData {
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func FourOhFour(c *RequestContext) ResponseData {
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return ResponseData{
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StatusCode: http.StatusNotFound,
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Body: bytes.NewBuffer([]byte("go away\n")),
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Body: bytes.NewBufferString("go away\n"),
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}
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}
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func ErrorLoggingWrapper(h HMNHandler) HMNHandler {
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return func(c *RequestContext) ResponseData {
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res := h(c)
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for _, err := range res.Errors {
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c.Logger.Error().Err(err).Msg("error occurred during request")
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}
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return res
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func ErrorLoggingHandler(c *RequestContext, res ResponseData) ResponseData {
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for _, err := range res.Errors {
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c.Logger.Error().Err(err).Msg("error occurred during request")
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}
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return res
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}
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func (s *websiteRoutes) CommonWebsiteDataWrapper(h HMNHandler) HMNHandler {
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return func(c *RequestContext) ResponseData {
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// get project
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{
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slug := ""
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hostParts := strings.SplitN(c.Req.Host, ".", 3)
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if len(hostParts) >= 3 {
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slug = hostParts[0]
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}
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dbProject, err := FetchProjectBySlug(c.Context(), s.conn, slug)
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if err != nil {
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return ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch current project"))
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}
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c.CurrentProject = dbProject
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func CommonWebsiteDataWrapper(c *RequestContext) (bool, ResponseData) {
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// get project
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{
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slug := ""
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hostParts := strings.SplitN(c.Req.Host, ".", 3)
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if len(hostParts) >= 3 {
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slug = hostParts[0]
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||||
}
|
||||
|
||||
sessionCookie, err := c.Req.Cookie(auth.SessionCookieName)
|
||||
if err == nil {
|
||||
user, err := s.getCurrentUserAndMember(c.Context(), sessionCookie.Value)
|
||||
if err != nil {
|
||||
return ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get current user and member"))
|
||||
}
|
||||
|
||||
c.CurrentUser = user
|
||||
dbProject, err := FetchProjectBySlug(c.Context(), c.Conn, slug)
|
||||
if err != nil {
|
||||
return false, ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch current project"))
|
||||
}
|
||||
// http.ErrNoCookie is the only error Cookie ever returns, so no further handling to do here.
|
||||
|
||||
return h(c)
|
||||
c.CurrentProject = dbProject
|
||||
}
|
||||
|
||||
sessionCookie, err := c.Req.Cookie(auth.SessionCookieName)
|
||||
if err == nil {
|
||||
user, err := getCurrentUserAndMember(c, sessionCookie.Value)
|
||||
if err != nil {
|
||||
return false, ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get current user and member"))
|
||||
}
|
||||
|
||||
c.CurrentUser = user
|
||||
}
|
||||
// http.ErrNoCookie is the only error Cookie ever returns, so no further handling to do here.
|
||||
|
||||
return true, ResponseData{}
|
||||
}
|
||||
|
||||
// Given a session id, fetches user and member data from the database. Will return nil for
|
||||
// both if neither can be found, and will only return an error if it's serious.
|
||||
//
|
||||
// TODO: actually return members :)
|
||||
func (s *websiteRoutes) getCurrentUserAndMember(ctx context.Context, sessionId string) (*models.User, error) {
|
||||
session, err := auth.GetSession(ctx, s.conn, sessionId)
|
||||
func getCurrentUserAndMember(c *RequestContext, sessionId string) (*models.User, error) {
|
||||
session, err := auth.GetSession(c.Context(), c.Conn, sessionId)
|
||||
if err != nil {
|
||||
if errors.Is(err, auth.ErrNoSession) {
|
||||
return nil, nil
|
||||
|
@ -297,7 +314,7 @@ func (s *websiteRoutes) getCurrentUserAndMember(ctx context.Context, sessionId s
|
|||
}
|
||||
}
|
||||
|
||||
userRow, err := db.QueryOne(ctx, s.conn, models.User{}, "SELECT $columns FROM auth_user WHERE username = $1", session.Username)
|
||||
userRow, err := db.QueryOne(c.Context(), c.Conn, models.User{}, "SELECT $columns FROM auth_user WHERE username = $1", session.Username)
|
||||
if err != nil {
|
||||
if errors.Is(err, db.ErrNoMatchingRows) {
|
||||
logging.Debug().Str("username", session.Username).Msg("returning no current user for this request because the user for the session couldn't be found")
|
||||
|
|
Loading…
Reference in New Issue