Update: increase session expiration time from 1 day to 1 month

configs/session.go

@@ -1,10 +1,16 @@
 package configs
 
-import "github.com/gofiber/fiber/v2/middleware/session"
+import (
+	"time"
+
+	"github.com/gofiber/fiber/v2/middleware/session"
+)
 
 var Store *session.Store
 
 func SetupStorage() {
-	Store = session.New()
+	Store = session.New(session.Config{
+		Expiration: time.Hour * 24 * 30,
+	})
 	Store.RegisterType("")
 }

handler/self.go

@@ -0,0 +1,34 @@
+package handler
+
+import (
+	"net/url"
+	"regexp"
+)
+
+func (p *PixivClient) FollowUser(id string) error {
+	formData := url.Values{}
+	formData.Add("mode", "add")
+	formData.Add("type", "user")
+	formData.Add("user_id", id)
+	formData.Add("tag", "")
+	formData.Add("restrict", "0")
+	formData.Add("format", "json")
+
+	init, err := p.GetCSRF()
+	println(init)
+	if err != nil {
+		return err
+	}
+
+	pattern := regexp.MustCompile(`.*pixiv.context.token = "([a-z0-9]{32})"?.*`)
+	quotesPattern := regexp.MustCompile(`([a-z0-9]{32})`)
+	token := quotesPattern.FindString(pattern.FindString(init))
+	println(token)
+
+	_, err = p.RequestWithFormData(FollowUserURL, formData, token)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}