63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
package main
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import (
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"encoding/json"
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"log"
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"net/http"
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)
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type loginChecker struct{
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students []Student
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}
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type loginUpload struct {
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Username string
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Password string
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}
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func (l loginChecker) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if addr := r.Header.Get("X-Forwarded-For"); addr != "" {
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r.RemoteAddr = addr
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}
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log.Printf("%s \"%s %s\" [%s]\n", r.RemoteAddr, r.Method, r.URL.Path, r.UserAgent())
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w.Header().Set("Content-Type", "text/plain")
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// Check request type and size
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if r.Method != "POST" {
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http.Error(w,
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"Invalid request",
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http.StatusBadRequest)
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return
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} else if r.ContentLength < 0 || r.ContentLength > 1023 {
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http.Error(w,
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"Request entity too large",
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http.StatusRequestEntityTooLarge)
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return
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}
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dec := json.NewDecoder(r.Body)
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var lu loginUpload
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if err := dec.Decode(&lu); err != nil {
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http.Error(w,
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err.Error(),
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http.StatusBadRequest)
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return
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}
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// Perform login check
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canContinue := false
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for _, std := range l.students {
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if std.Login == lu.Username {
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canContinue = true
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}
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}
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if !canContinue {
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http.Error(w, "Login not found in whitelist.", http.StatusUnauthorized)
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return
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}
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http.Error(w, "Success", http.StatusOK)
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}
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