add support for custom domain names

Author: devksingh4

Makefile

@@ -11,7 +11,7 @@ integration_test_directory_root = tests/live_integration/
 # CHANGE ME (as needed)
 application_key=infra-core-api
 application_name="InfraCoreApi"
-techlead="dsingh14@illinois.edu"
+techlead="tarasha2@illinois.edu"
 region="us-east-1"
 
 # DO NOT CHANGE

cloudformation/custom-domain.yml

@@ -0,0 +1,50 @@
+Parameters:
+  GWCertArn:
+    Description: Certificate ARN
+    Type: String
+  GWBaseDomainName:
+    Description: Base domain name
+    Type: String
+  GWApiId:
+    Description: API ID
+    Type: String
+  GWHostedZoneId:
+    Description: Hosted Zone ID
+    Type: String
+  RunEnvironment:
+    Type: String
+    AllowedValues: [ 'dev', 'prod' ]
+  RecordName:
+    Type: String
+
+Conditions:
+  IsDev: !Equals [!Ref RunEnvironment, 'dev']
+
+Resources:
+  CustomDomainName:
+    Type: AWS::ApiGateway::DomainName
+    Properties:
+      RegionalCertificateArn: !Ref GWCertArn
+      EndpointConfiguration:
+        Types:
+          - REGIONAL
+      DomainName: !Sub "${RecordName}.${GWBaseDomainName}"
+      SecurityPolicy: TLS_1_2
+
+  CDApiMapping:
+    Type: 'AWS::ApiGatewayV2::ApiMapping'
+    Properties:
+      DomainName: !Ref CustomDomainName
+      ApiId: !Ref GWApiId
+      Stage: default
+
+  CDRoute53RecordSetDev:
+    Condition: IsDev
+    Type: AWS::Route53::RecordSet
+    Properties:
+      HostedZoneId: !Ref GWHostedZoneId
+      Name: !Sub "${RecordName}.${GWBaseDomainName}"
+      Type: A
+      AliasTarget:
+        DNSName: !GetAtt CustomDomainName.RegionalDomainName
+        HostedZoneId: !GetAtt CustomDomainName.RegionalHostedZoneId

cloudformation/main.yml

@@ -81,6 +81,42 @@ Resources:
         LambdaFunctionName: !Sub ${ApplicationPrefix}-lambda
         LogRetentionDays: !FindInMap [General, !Ref RunEnvironment, LogRetentionDays]
 
+  IcalDomainProxy:
+    Type: AWS::Serverless::Application
+    Properties:
+      Location: ./custom-domain.yml
+      Parameters:
+        RunEnvironment: !Ref RunEnvironment
+        RecordName: ical
+        GWBaseDomainName: !FindInMap
+            - ApiGwConfig
+            - !Ref RunEnvironment
+            - LinkryApiDomainName
+        GWCertArn: !FindInMap
+            - ApiGwConfig
+            - !Ref RunEnvironment
+            - LinkryApiCertificateArn
+        GWApiId: !Ref AppApiGateway
+        GWHostedZoneId: !FindInMap [ApiGwConfig, !Ref RunEnvironment, HostedZoneId]
+
+  LinkryDomainProxy:
+    Type: AWS::Serverless::Application
+    Properties:
+      Location: ./custom-domain.yml
+      Parameters:
+        RunEnvironment: !Ref RunEnvironment
+        RecordName: go
+        GWBaseDomainName: !FindInMap
+            - ApiGwConfig
+            - !Ref RunEnvironment
+            - LinkryApiDomainName
+        GWCertArn: !FindInMap
+            - ApiGwConfig
+            - !Ref RunEnvironment
+            - LinkryApiCertificateArn
+        GWApiId: !Ref AppApiGateway
+        GWHostedZoneId: !FindInMap [ApiGwConfig, !Ref RunEnvironment, HostedZoneId]
+
   AppApiLambdaFunction:
     Type: AWS::Serverless::Function
     DependsOn:
@@ -302,75 +338,3 @@ Resources:
           - ":"
           - !Ref AppApiGateway
           - "/*/*/*"
-
-  LinkryCustomDomainName:
-    Type: AWS::ApiGateway::DomainName
-    Properties:
-      RegionalCertificateArn: !FindInMap [ApiGwConfig, !Ref RunEnvironment, LinkryApiCertificateArn]
-      EndpointConfiguration:
-        Types:
-          - REGIONAL
-      DomainName: !Sub
-        - "go.${BaseDomainName}"
-        - BaseDomainName: !FindInMap
-            - ApiGwConfig
-            - !Ref RunEnvironment
-            - LinkryApiDomainName
-      SecurityPolicy: TLS_1_2
-
-  LinkryRoute53RecordSetDev:
-    Condition: IsDev
-    Type: AWS::Route53::RecordSet
-    Properties:
-      HostedZoneId: !FindInMap [ApiGwConfig, !Ref RunEnvironment, HostedZoneId]
-      Name: !Sub
-        - "go.${BaseDomainName}"
-        - BaseDomainName: !FindInMap
-            - ApiGwConfig
-            - !Ref RunEnvironment
-            - LinkryApiDomainName
-      Type: A
-      AliasTarget:
-        DNSName: !GetAtt LinkryCustomDomainName.RegionalDomainName
-        HostedZoneId: !GetAtt LinkryCustomDomainName.RegionalHostedZoneId
-
-  LinkryApiMapping:
-    Type: 'AWS::ApiGatewayV2::ApiMapping'
-    Properties:
-      DomainName: !Sub
-        - "go.${BaseDomainName}"
-        - BaseDomainName: !FindInMap
-            - ApiGwConfig
-            - !Ref RunEnvironment
-            - LinkryApiDomainName
-      ApiId: !Ref AppApiGateway
-      Stage: default
-
-  IcalCustomDomainName:
-    Type: AWS::ApiGateway::DomainName
-    Condition: IsProd
-    Properties:
-      RegionalCertificateArn: !FindInMap [ApiGwConfig, !Ref RunEnvironment, LinkryApiCertificateArn]
-      EndpointConfiguration:
-        Types:
-          - REGIONAL
-      DomainName: !Sub
-        - "ical.${BaseDomainName}"
-        - BaseDomainName: !FindInMap
-            - ApiGwConfig
-            - !Ref RunEnvironment
-            - LinkryApiDomainName
-      SecurityPolicy: TLS_1_2
-
-  IcalApiMapping:
-    Type: 'AWS::ApiGatewayV2::ApiMapping'
-    Condition: IsProd
-    Properties:
-      DomainName: !Sub
-        - "ical.${BaseDomainName}"
-        - BaseDomainName: !FindInMap
-            - ApiGwConfig
-            - !Ref RunEnvironment
-            - LinkryApiDomainName
-      ApiId: !Ref AppApiGateway
-      Stage: default

cloudformation/phony-swagger.yml

@@ -7,6 +7,26 @@ info:
     email: [email protected]
 
 paths:
+  /:
+    x-amazon-apigateway-any-method:
+      responses:
+        200:
+          description: OK
+
+      x-amazon-apigateway-auth:
+        type: NONE
+
+      x-amazon-apigateway-integration:
+        responses:
+          default:
+            statusCode: 200
+        passthroughBehavior: when_no_match
+        httpMethod: POST
+        contentHandling: CONVERT_TO_TEXT
+        type: aws_proxy
+        uri:
+          Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:${ApplicationPrefix}-lambda/invocations"
+
   /{proxy+}:
     x-amazon-apigateway-any-method:
       responses:
@@ -25,4 +45,4 @@ paths:
         contentHandling: CONVERT_TO_TEXT
         type: aws_proxy
         uri:
-          Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:${ApplicationPrefix}-lambda/invocations"
+          Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:${ApplicationPrefix}-lambda/invocations"

src/api/index.ts

@@ -28,6 +28,20 @@ async function init() {
     logger: {
       level: process.env.LOG_LEVEL || "info",
     },
+    rewriteUrl: (req) => {
+      const url = req.url;
+      const hostname = req.headers.host || "";
+      const customDomainBaseMappers: Record<string, string> = {
+        "ical.acm.illinois.edu": `/api/v1/ical${url}`,
+        "ical.aws.qa.acmuiuc.org": `/api/v1/ical${url}`,
+        "go.acm.illinois.edu": `/api/v1/linkry/redir${url}`,
+        "go.aws.qa.acmuiuc.org": `/api/v1/linkry/redir${url}`,
+      };
+      if (hostname in customDomainBaseMappers) {
+        return customDomainBaseMappers[hostname];
+      }
+      return url || "/";
+    },
     disableRequestLogging: true,
     genReqId: (request) => {
       const header = request.headers["x-apigateway-event"];
@@ -56,7 +70,9 @@ async function init() {
     environmentConfig[app.runEnvironment as RunEnvironment];
   app.addHook("onRequest", (req, _, done) => {
     req.startTime = now();
-    req.log.info({ url: req.raw.url }, "received request");
+    const hostname = req.hostname;
+    const url = req.raw.url;
+    req.log.info({ hostname, url }, "received request");
     done();
   });