I’m attempting to transfer cookies retrieved from a headless browser in Golang to the cookie jar of the requests package. There are certain cookies generated by JavaScript that I need to extract using the headless browser and then send to the requests framework. Currently, I have a function that exports the cookies from the headless browser to a JSON file. However, I’m uncertain how to directly insert these cookies into the cookie jar for use with the requests. Here’s a snippet of my code:
func exportCookies() {
cookies := browser.FetchCookies()
jsonData, _ := json.Marshal(cookies)
}
The jsonData variable outputs the cookies in this structure:
{"name":"name","value":"value","domain":"domain","path":"path","expires":expires,"size":size,"httpOnly":bool,"secure":bool,"session":bool,"priority":"priority","sameParty":bool,"sourceScheme":"Secure","sourcePort":port}
To transfer cookies from a headless browser's JSON format into Colly's cookie jar in Golang, you will need to read and parse the JSON data and then manually insert each cookie into the cookie jar. This process involves converting the JSON object into a format that Colly understands. Here is a step-by-step approach to achieve this:
package main
import (
"encoding/json"
"fmt"
"github.com/gocolly/colly/v2"
"time"
"net/http"
)
func exportCookies() {
// Sample JSON data representing cookies
jsonData := `[{"name":"name","value":"value","domain":"domain","path":"path","expires":1613158668,"httpOnly":true,"secure":true,"session":false}]`
// Define a struct to match the JSON structure
var cookies []struct {
Name string `json:"name"`
Value string `json:"value"`
Domain string `json:"domain"`
Path string `json:"path"`
Expires int64 `json:"expires"`
HttpOnly bool `json:"httpOnly"`
Secure bool `json:"secure"`
}
// Parse JSON data
if err := json.Unmarshal([]byte(jsonData), &cookies); err != nil {
fmt.Println("Error unmarshalling JSON:", err)
return
}
// Initialize a Colly collector
c := colly.NewCollector()
// Get the default cookie jar
jar := c.CookiesJar
// Add cookies to the cookie jar
for _, ck := range cookies {
// Convert the cookie expiration timestamp to time.Time
expiration := time.Unix(ck.Expires, 0)
// Create a new http.Cookie instance
httpCookie := &http.Cookie{
Name: ck.Name,
Value: ck.Value,
Domain: ck.Domain,
Path: ck.Path,
Expires: expiration,
HttpOnly: ck.HttpOnly,
Secure: ck.Secure,
}
// Add the cookie to the Colly's cookie jar
jar.SetCookies(ck.Domain, []*http.Cookie{httpCookie})
}
// Now, the cookies are set and can be used by the collector
}
func main() {
exportCookies()
}
This example shows how to parse each cookie into a http.Cookie object and store it in the Colly's cookie jar. This should allow you to migrate the cookies between the headless browser and the requests framework effectively.
To insert cookies from a headless browser JSON into Colly's cookie jar, you'll need to parse the JSON and manually add each cookie. Here's a succinct example:
package main
import (
"encoding/json"
"github.com/gocolly/colly/v2"
"net/http"
"time"
)
func setCookiesToJar(jsonData string) {
var cookies []struct {
Name string `json:"name"`
Value string `json:"value"`
Domain string `json:"domain"`
Path string `json:"path"`
Expires int64 `json:"expires"`
HttpOnly bool `json:"httpOnly"`
Secure bool `json:"secure"`
}
json.Unmarshal([]byte(jsonData), &cookies)
c := colly.NewCollector()
jar := c.CookiesJar
for _, ck := range cookies {
expiration := time.Unix(ck.Expires, 0)
httpCookie := &http.Cookie{
Name: ck.Name,
Value: ck.Value,
Domain: ck.Domain,
Path: ck.Path,
Expires: expiration,
HttpOnly: ck.HttpOnly,
Secure: ck.Secure,
}
jar.SetCookies(ck.Domain, []*http.Cookie{httpCookie})
}
}
func main() {
jsonData := `[{"name":"name","value":"value","domain":"domain","path":"path","expires":1613158668,"httpOnly":true,"secure":true}]`
setCookiesToJar(jsonData)
}
This code parses cookies into http.Cookie objects and adds them to Colly's cookie jar.