126 lines
2.9 KiB
Go
126 lines
2.9 KiB
Go
package website
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import (
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"bytes"
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"context"
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"io"
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"net/http"
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"net/url"
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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/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) Handle(method, route string, handler 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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r.HttpRouter.Handle(method, route, handleHmnHandler(route, handler))
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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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type HMNHandler func(c *RequestContext, p httprouter.Params)
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type HMNHandlerWrapper func(h HMNHandler) HMNHandler
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type RequestContext struct {
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StatusCode int
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Body *bytes.Buffer
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Logger *zerolog.Logger
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Req *http.Request
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Errors []error
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rw http.ResponseWriter
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currentProject *models.Project
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}
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func newRequestContext(rw http.ResponseWriter, req *http.Request, route string) *RequestContext {
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logger := logging.With().Str("route", route).Logger()
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return &RequestContext{
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StatusCode: http.StatusOK,
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Body: new(bytes.Buffer),
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Logger: &logger,
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Req: req,
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rw: rw,
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}
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}
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func (c *RequestContext) Context() context.Context {
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return c.Req.Context()
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}
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func (c *RequestContext) URL() *url.URL {
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return c.Req.URL
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}
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func (c *RequestContext) Headers() http.Header {
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return c.rw.Header()
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}
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func (c *RequestContext) WriteTemplate(name string, data interface{}) error {
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return templates.Templates[name].Execute(c.Body, data)
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}
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func (c *RequestContext) AddErrors(errs ...error) {
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c.Errors = append(c.Errors, errs...)
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}
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func (c *RequestContext) Errored(status int, errs ...error) {
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c.StatusCode = status
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c.AddErrors(errs...)
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}
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func handleHmnHandler(route string, h HMNHandler) httprouter.Handle {
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return func(rw http.ResponseWriter, r *http.Request, p httprouter.Params) {
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c := newRequestContext(rw, r, route)
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defer func() {
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/*
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This panic recovery is the last resort. If you want to render
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an error page or something, make it a request wrapper.
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*/
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if recovered := recover(); recovered != nil {
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rw.WriteHeader(http.StatusInternalServerError)
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logging.LogPanicValue(c.Logger, recovered, "request panicked and was not handled")
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}
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}()
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h(c, p)
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rw.WriteHeader(c.StatusCode)
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io.Copy(rw, c.Body)
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}
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}
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