ngx-captcha-ssr
Version:
Dynamic captcha (Google reCaptcha) implementation for Angular
134 lines • 18 kB
JavaScript
import { isPlatformBrowser } from "@angular/common";
import { Inject, Injectable, NgZone, PLATFORM_ID } from "@angular/core";
import * as i0 from "@angular/core";
export class ScriptService {
constructor(zone, platformId) {
this.zone = zone;
this.platformId = platformId;
this.scriptElemId = "ngx-catpcha-script";
/**
* Name of the global google recaptcha script
*/
this.windowGrecaptcha = "grecaptcha";
/**
* Name of enterpise property in the global google recaptcha script
*/
this.windowGrecaptchaEnterprise = "enterprise";
/**
* Name of the global callback
*/
this.windowOnLoadCallbackProperty = "ngx_captcha_onload_callback";
/**
* Name of the global callback for enterprise
*/
this.windowOnLoadEnterpriseCallbackProperty = "ngx_captcha_onload_enterprise_callback";
this.globalDomain = "recaptcha.net";
this.defaultDomain = "google.com";
this.enterpriseApi = "enterprise.js";
this.defaultApi = "api.js";
}
registerCaptchaScript(config, render, onLoad, language) {
if (isPlatformBrowser(this.platformId)) {
if (this.grecaptchaScriptLoaded(config.useEnterprise)) {
// recaptcha script is already loaded
// just call the callback
if (config.useEnterprise) {
this.zone.run(() => {
onLoad(window[this.windowGrecaptcha][this.windowGrecaptchaEnterprise]);
});
}
else {
this.zone.run(() => {
onLoad(window[this.windowGrecaptcha]);
});
}
return;
}
// we need to patch the callback through global variable, otherwise callback is not accessible
// note: https://github.com/Enngage/ngx-captcha/issues/2
if (config.useEnterprise) {
window[this.getCallbackName(true)] = ((() => this.zone.run(onLoad.bind(this, window[this.windowGrecaptcha][this.windowGrecaptchaEnterprise]))));
}
else {
window[this.getCallbackName(false)] = ((() => this.zone.run(onLoad.bind(this, window[this.windowGrecaptcha]))));
}
// prepare script elem
const scriptElem = document.createElement("script");
scriptElem.id = this.scriptElemId;
scriptElem.innerHTML = "";
scriptElem.src = this.getCaptchaScriptUrl(config, render, language);
scriptElem.async = true;
scriptElem.defer = true;
// add script to header
document.getElementsByTagName("head")[0].appendChild(scriptElem);
}
}
cleanup() {
const elem = document.getElementById(this.scriptElemId);
if (elem) {
elem.remove();
}
window[this.getCallbackName()] = undefined;
window[this.windowGrecaptcha] = undefined;
}
/**
* Indicates if google recaptcha script is available and ready to be used
*/
grecaptchaScriptLoaded(useEnterprise) {
if (!window[this.getCallbackName(useEnterprise)] ||
!window[this.windowGrecaptcha]) {
return false;
}
else if (useEnterprise &&
window[this.windowGrecaptcha][this.windowGrecaptchaEnterprise]) {
return true;
// if only enterprise script is loaded we need to check some v3's method
}
else if (window[this.windowGrecaptcha].execute) {
return true;
}
return false;
}
/**
* Gets global callback name
* @param useEnterprise Optional flag for enterprise script
* @private
*/
getCallbackName(useEnterprise) {
return useEnterprise
? this.windowOnLoadEnterpriseCallbackProperty
: this.windowOnLoadCallbackProperty;
}
/**
* Gets language param used in script url
*/
getLanguageParam(hl) {
if (!hl) {
return "";
}
return `&hl=${hl}`;
}
/**
* Url to google api script
*/
getCaptchaScriptUrl(config, render, language) {
const domain = config.useGlobalDomain
? this.globalDomain
: this.defaultDomain;
const api = config.useEnterprise ? this.enterpriseApi : this.defaultApi;
const callback = this.getCallbackName(config.useEnterprise);
return `https://www.${domain}/recaptcha/${api}?onload=${callback}&render=${render}${this.getLanguageParam(language)}`;
}
}
/** @nocollapse */ ScriptService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.0.4", ngImport: i0, type: ScriptService, deps: [{ token: i0.NgZone }, { token: PLATFORM_ID }], target: i0.ɵɵFactoryTarget.Injectable });
/** @nocollapse */ ScriptService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.0.4", ngImport: i0, type: ScriptService, providedIn: "root" });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.0.4", ngImport: i0, type: ScriptService, decorators: [{
type: Injectable,
args: [{
providedIn: "root",
}]
}], ctorParameters: function () { return [{ type: i0.NgZone }, { type: Object, decorators: [{
type: Inject,
args: [PLATFORM_ID]
}] }]; } });
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{ isPlatformBrowser } from \"@angular/common\";\r\nimport { Inject, Injectable, NgZone, PLATFORM_ID } from \"@angular/core\";\r\nimport { RecaptchaConfiguration } from \"../models/recaptcha-configuration\";\r\n\r\n@Injectable({\r\n  providedIn: \"root\",\r\n})\r\nexport class ScriptService {\r\n  private readonly scriptElemId: string = \"ngx-catpcha-script\";\r\n\r\n  /**\r\n   * Name of the global google recaptcha script\r\n   */\r\n  protected readonly windowGrecaptcha = \"grecaptcha\";\r\n\r\n  /**\r\n   * Name of enterpise property in the global google recaptcha script\r\n   */\r\n  protected readonly windowGrecaptchaEnterprise = \"enterprise\";\r\n\r\n  /**\r\n   * Name of the global callback\r\n   */\r\n  protected readonly windowOnLoadCallbackProperty =\r\n    \"ngx_captcha_onload_callback\";\r\n\r\n  /**\r\n   * Name of the global callback for enterprise\r\n   */\r\n  protected readonly windowOnLoadEnterpriseCallbackProperty =\r\n    \"ngx_captcha_onload_enterprise_callback\";\r\n\r\n  protected readonly globalDomain: string = \"recaptcha.net\";\r\n\r\n  protected readonly defaultDomain: string = \"google.com\";\r\n\r\n  protected readonly enterpriseApi: string = \"enterprise.js\";\r\n\r\n  protected readonly defaultApi: string = \"api.js\";\r\n\r\n  constructor(protected zone: NgZone, @Inject(PLATFORM_ID) private platformId: Object) { }\r\n\r\n  registerCaptchaScript(\r\n    config: RecaptchaConfiguration,\r\n    render: string,\r\n    onLoad: (grecaptcha: any) => void,\r\n    language?: string\r\n  ): void {\r\n    if (isPlatformBrowser(this.platformId)) {\r\n      if (this.grecaptchaScriptLoaded(config.useEnterprise)) {\r\n        // recaptcha script is already loaded\r\n        // just call the callback\r\n        if (config.useEnterprise) {\r\n          this.zone.run(() => {\r\n            onLoad(\r\n              (window as any)[this.windowGrecaptcha][\r\n              this.windowGrecaptchaEnterprise\r\n              ]\r\n            );\r\n          });\r\n        } else {\r\n          this.zone.run(() => {\r\n            onLoad((window as any)[this.windowGrecaptcha]);\r\n          });\r\n        }\r\n        return;\r\n      }\r\n\r\n      // we need to patch the callback through global variable, otherwise callback is not accessible\r\n      // note: https://github.com/Enngage/ngx-captcha/issues/2\r\n      if (config.useEnterprise) {\r\n        (window as any)[this.getCallbackName(true)] = <any>(\r\n          (() =>\r\n            this.zone.run(\r\n              onLoad.bind(\r\n                this,\r\n                (window as any)[this.windowGrecaptcha][\r\n                this.windowGrecaptchaEnterprise\r\n                ]\r\n              )\r\n            ))\r\n        );\r\n      } else {\r\n        (window as any)[this.getCallbackName(false)] = <any>(\r\n          (() =>\r\n            this.zone.run(\r\n              onLoad.bind(this, (window as any)[this.windowGrecaptcha])\r\n            ))\r\n        );\r\n      }\r\n\r\n      // prepare script elem\r\n      const scriptElem = document.createElement(\"script\");\r\n      scriptElem.id = this.scriptElemId;\r\n      scriptElem.innerHTML = \"\";\r\n      scriptElem.src = this.getCaptchaScriptUrl(config, render, language);\r\n      scriptElem.async = true;\r\n      scriptElem.defer = true;\r\n\r\n      // add script to header\r\n      document.getElementsByTagName(\"head\")[0].appendChild(scriptElem);\r\n    }\r\n  }\r\n\r\n  cleanup(): void {\r\n    const elem = document.getElementById(this.scriptElemId);\r\n\r\n    if (elem) {\r\n      elem.remove();\r\n    }\r\n    (window as any)[this.getCallbackName()] = undefined;\r\n    (window as any)[this.windowGrecaptcha] = undefined;\r\n  }\r\n\r\n  /**\r\n   * Indicates if google recaptcha script is available and ready to be used\r\n   */\r\n  private grecaptchaScriptLoaded(useEnterprise?: boolean): boolean {\r\n    if (\r\n      !(window as any)[this.getCallbackName(useEnterprise)] ||\r\n      !(window as any)[this.windowGrecaptcha]\r\n    ) {\r\n      return false;\r\n    } else if (\r\n      useEnterprise &&\r\n      (window as any)[this.windowGrecaptcha][this.windowGrecaptchaEnterprise]\r\n    ) {\r\n      return true;\r\n      // if only enterprise script is loaded we need to check some v3's method\r\n    } else if ((window as any)[this.windowGrecaptcha].execute) {\r\n      return true;\r\n    }\r\n    return false;\r\n  }\r\n\r\n  /**\r\n   * Gets global callback name\r\n   * @param useEnterprise Optional flag for enterprise script\r\n   * @private\r\n   */\r\n  private getCallbackName(useEnterprise?: boolean): string {\r\n    return useEnterprise\r\n      ? this.windowOnLoadEnterpriseCallbackProperty\r\n      : this.windowOnLoadCallbackProperty;\r\n  }\r\n\r\n  /**\r\n   * Gets language param used in script url\r\n   */\r\n  private getLanguageParam(hl?: string): string {\r\n    if (!hl) {\r\n      return \"\";\r\n    }\r\n\r\n    return `&hl=${hl}`;\r\n  }\r\n\r\n  /**\r\n   * Url to google api script\r\n   */\r\n  private getCaptchaScriptUrl(\r\n    config: RecaptchaConfiguration,\r\n    render: string,\r\n    language?: string\r\n  ): string {\r\n    const domain = config.useGlobalDomain\r\n      ? this.globalDomain\r\n      : this.defaultDomain;\r\n    const api = config.useEnterprise ? this.enterpriseApi : this.defaultApi;\r\n    const callback = this.getCallbackName(config.useEnterprise);\r\n\r\n    return `https://www.${domain}/recaptcha/${api}?onload=${callback}&render=${render}${this.getLanguageParam(\r\n      language\r\n    )}`;\r\n  }\r\n}\r\n"]}