aplus/main.go

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/http/cookiejar"
	"strings"

	"golang.org/x/net/publicsuffix"
)

var base_link string
var token string

func main() {

	jar, _ := cookiejar.New(&cookiejar.Options{
		PublicSuffixList: publicsuffix.List,
	})

	client := http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			fmt.Println("Redirected to:", req.URL)
			fmt.Println(req.Cookies())
			return nil
		},
		Jar: jar,
	}

	initialize()

	// select_course()

	aplus_link := fmt.Sprintf("%s/courses/%d/external_tools/sessionless_launch?id=913&access_token=%s", base_link, 7329, token) // 7329 always works
	aplus := get_aplus(token, aplus_link, client)
	fmt.Println(aplus)
	resp, err := client.Get(aplus)

	if err != nil {
		fmt.Println("Error while performing GET request to aplus auth link.")
	}

	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)

	form_str := get_form_from_request_body(body)
	fmt.Println(form_str)

	form_values := parse_form(form_str)

	fmt.Println("Form Values:")
	for key, values := range form_values {
		fmt.Printf("%s: %s\n", key, values)
	}

	//req, _ := client.PostForm("https://floridapoly.aplusattendance.com/canvas", form_values)
	req, _ := http.NewRequest(http.MethodPost, "https://floridapoly.aplusattendance.com/canvas", strings.NewReader(form_values.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.Header.Set("Access-Control-Allow-Origin", "*")
	req.Header.Set("Access-Control-Allow-Credentials", "true")
	req.Header.Set("Access-Control-Allow-Headers", "Content-Type,access-control-allow-origin, access-control-allow-headers,access-control-allow-credentials")

	resp, err = client.Do(req)

	if err != nil {
		fmt.Println("Error posting form to Aplus Attendance.")
	}

	body, err = io.ReadAll(resp.Body)

	if err != nil {
		fmt.Println("Error reading body of post form response from aplus attendance.")
	}

	fmt.Println(string(body))
	//fmt.Println(resp)
	fmt.Println(resp.Header)
	fmt.Println(resp.Cookies())
	// we need to submit the above post request correctly in order to submit this request.
	//resp, _ = client.Get("https://floridapoly.aplusattendance.com/canvas/student/?canvasCourse=7329&doStudentAuth=truee")
	//body, _ = io.ReadAll(resp.Body)

	//fmt.Println(string(body))
	//fmt.Println(req)
}