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CustomHttpHeaders.md

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Custom http headers

Custom headers are implemented using OkHttp interceptor for android and method swizzling for iOS.

Method swizzling is done on the [NSMutableURLRequest requestWithURL:] to allow adding headers during runtime.

Prerequisites

Android

None

iOS with Mapbox-v10

None

iOS with Mapbox GL or Mapblibre

To enable this on iOS you need to call [[MGLCustomHeaders sharedInstance] initHeaders] pretty early in the lifecycle of the application. This will swizzle the custom method. Suggested location is [AppDelegate application: didFinishLaunchingWithOptions:]

Working example (AppDelegate.m)

// (1) Include the header file
#import "MGLCustomHeaders.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
  RCTRootView *rootView = [[RCTRootView alloc] initWithBridge:bridge
                                                   moduleName:@"SampleApp"
                                            initialProperties:nil];
  // (2) Init headers, add swizzle method
  [[MGLCustomHeaders sharedInstance] initHeaders];
  // (3*) Optionally you can add some global headers here
  [[MGLCustomHeaders sharedInstance] addHeader:@"IP" forHeaderName:@"X-For-Real"];

  ...
  return YES;
}

...

@end

Sending custom http headers with the tile requests

You can configure sending of custom http headers to your tile server. This is to support custom authentication or custom metadata which can't be included in the url.

You can add and remove headers at runtime.

To add a header

    MapboxGL.addCustomHeader('Authorization', '{auth header}');

To remove a header

    MapboxGL.removeCustomHeader('Authorization');

Working example

export default class HelloWorldApp extends Component {
  componentDidMount() {
    MapboxGL.addCustomHeader('Authorization', '{auth header}');
  }

  render() {
    MapboxGL.addCustomHeader('X-Some-Header', 'my-value');
    return (
      <View style={styles.page}>
        <View style={styles.container}>
          <MapboxGL.MapView 
            style={styles.map} 
            styleURL={STYLE_URL} />
        </View>
      </View>
    );
  }
}