Rejecting Undesired Requests

You can use BrowserQL to block undesired content, resources and requests.

PDF

BQL Query

mutation PDF {
  reject(type: [image, stylesheet]) {
    enabled
    time
  }

  goto(url: "https://browserless.io/") {
    status
  }

  pdf(displayHeaderFooter: true, printBackground: false, format: a0) {
    base64
  }
}

cURL

curl --request POST \
  --url 'https://production-sfo.browserless.io/chromium/bql?token=YOUR_API_TOKEN_HERE' \
  --header 'Content-Type: application/json' \
  --data '{"query":"mutation PDF {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n\n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  pdf(displayHeaderFooter: true, printBackground: false, format: a0) {\n    base64\n  }\n}","variables":"","operationName":"PDF"}'

Javascript

const endpoint = "https://production-sfo.browserless.io/chromium/bql";
const token = "YOUR_API_TOKEN_HERE";

const options = {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({"query":"mutation PDF {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n\n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  pdf(displayHeaderFooter: true, printBackground: false, format: a0) {\n    base64\n  }\n}","variables":"","operationName":"PDF"})
};

const url = `${endpoint}?token=${token}`;
const response = await fetch(url, options);
const data = await response.json();

console.log(data);

Python

import requests

endpoint = "https://production-sfo.browserless.io/chromium/bql"
query_string = {
    "token": "YOUR_API_TOKEN_HERE",
}
headers = {
    "Content-Type": "application/json",
}
payload = {
    "query": "mutation PDF {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n\n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  pdf(displayHeaderFooter: true, printBackground: false, format: a0) {\n    base64\n  }\n}",
    "variables": None,
    "operationName": "PDF",
}

response = requests.post(endpoint, params=query_string, headers=headers, json=payload)
print(response.json())

Java

String url = "https://production-sfo.browserless.io/chromium/bql";
String token = "YOUR_API_TOKEN_HERE";
String endpoint = String.format("%s?token=%s%s%s", url, token);

HttpResponse<String> response = Unirest.post(endpoint)
    .header("Content-Type", "application/json")
    .body({"query":"mutation PDF {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n\n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  pdf(displayHeaderFooter: true, printBackground: false, format: a0) {\n    base64\n  }\n}","variables":"","operationName":"PDF"})
    .asString();

C#

string url = "https://production-sfo.browserless.io/chromium/bql";
string token = "YOUR_API_TOKEN_HERE";
string endpoint = $"{url}?token={token}";

var payload = new
{
    query = @"mutation PDF {
  reject(type: [image, stylesheet]) {
    enabled
    time
  }

  goto(url: ""https://browserless.io/"") {
    status
  }

  pdf(displayHeaderFooter: true, printBackground: false, format: a0) {
    base64
  }
}",
    variables = "",
    operationName = "PDF"
};

using (var client = new HttpClient())
{
    var jsonPayload = System.Text.Json.JsonSerializer.Serialize(payload);
    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

    var response = await client.PostAsync(endpoint, content);
    string responseBody = await response.Content.ReadAsStringAsync();
    
    Console.WriteLine(responseBody);
}

Screenshot

BQL Query

mutation Screenshot {
  reject(type: [image, stylesheet]) {
    enabled
    time
  }
  
  goto(url: "https://browserless.io/") {
    status
  }

  screenshot(type: webp) {
    base64
  }
}

cURL

curl --request POST \
  --url 'https://production-sfo.browserless.io/chromium/bql?token=YOUR_API_TOKEN_HERE' \
  --header 'Content-Type: application/json' \
  --data '{"query":"mutation Screenshot {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n  \n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  screenshot(type: webp) {\n    base64\n  }\n}","variables":"","operationName":"Screenshot"}'

Javascript

const endpoint = "https://production-sfo.browserless.io/chromium/bql";
const token = "YOUR_API_TOKEN_HERE";

const options = {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({"query":"mutation Screenshot {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n  \n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  screenshot(type: webp) {\n    base64\n  }\n}","variables":"","operationName":"Screenshot"})
};

const url = `${endpoint}?token=${token}`;
const response = await fetch(url, options);
const data = await response.json();

console.log(data);

Python

import requests

endpoint = "https://production-sfo.browserless.io/chromium/bql"
query_string = {
    "token": "YOUR_API_TOKEN_HERE",
}
headers = {
    "Content-Type": "application/json",
}
payload = {
    "query": "mutation Screenshot {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n  \n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  screenshot(type: webp) {\n    base64\n  }\n}",
    "variables": None,
    "operationName": "Screenshot",
}

response = requests.post(endpoint, params=query_string, headers=headers, json=payload)
print(response.json())

Java

String url = "https://production-sfo.browserless.io/chromium/bql";
String token = "YOUR_API_TOKEN_HERE";
String endpoint = String.format("%s?token=%s%s%s", url, token);

HttpResponse<String> response = Unirest.post(endpoint)
    .header("Content-Type", "application/json")
    .body({"query":"mutation Screenshot {\n  reject(type: [image, stylesheet]) {\n    enabled\n    time\n  }\n  \n  goto(url: \"https://browserless.io/\") {\n    status\n  }\n\n  screenshot(type: webp) {\n    base64\n  }\n}","variables":"","operationName":"Screenshot"})
    .asString();

C#

string url = "https://production-sfo.browserless.io/chromium/bql";
string token = "YOUR_API_TOKEN_HERE";
string endpoint = $"{url}?token={token}";

var payload = new
{
    query = @"mutation Screenshot {
  reject(type: [image, stylesheet]) {
    enabled
    time
  }
  
  goto(url: ""https://browserless.io/"") {
    status
  }

  screenshot(type: webp) {
    base64
  }
}",
    variables = "",
    operationName = "Screenshot"
};

using (HttpClient client = new HttpClient())
{
    var jsonPayload = System.Text.Json.JsonSerializer.Serialize(payload);
    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

    var response = await client.PostAsync(endpoint, content);
    string responseBody = await response.Content.ReadAsStringAsync();
    
    Console.WriteLine(responseBody);
}

BQL Schemas

For more details on BQL mutations, refer to the BrowserQL Schema reference pages.

Rest API

Generating PDFs and Taking Screenshots can also be done with Browserless Rest API.