Add support for Bearer Authentication

Signed-off-by: Alex Rothberg <agrothberg@gmail.com>

Author: cancan101

packages/openapi-to-graphql/src/auth_builder.ts

@@ -85,6 +85,10 @@ export function createAndLoadViewer<TSource, TContext, TArgs>(
           viewerType = 'basicAuth'
           break
 
+        case 'bearer':
+          viewerType = 'bearerAuth'
+          break
+
         default:
           handleWarning({
             mitigationType: MitigationTypes.UNSUPPORTED_HTTP_SECURITY_SCHEME,

packages/openapi-to-graphql/src/preprocessor.ts

@@ -584,6 +584,27 @@ function getProcessedSecuritySchemes<TSource, TContext, TArgs>(
             }
             break
 
+            case 'bearer':
+              description = `Bearer auth credentials for security protocol '${schemeKey}'`
+
+              parameters = {
+                token: Oas3Tools.sanitize(
+                  `${schemeKey}_token`,
+                  Oas3Tools.CaseStyle.camelCase
+                )
+              }
+
+              schema = {
+                type: 'object',
+                description,
+                properties: {
+                  token: {
+                    type: 'string'
+                  }
+                }
+              }
+              break
+
           default:
             handleWarning({
               mitigationType: MitigationTypes.UNSUPPORTED_HTTP_SECURITY_SCHEME,
@@ -700,12 +721,12 @@ export function createDataDef<TSource, TContext, TArgs>(
     const existingDataDef = data.defs[index]
 
     /**
-     * Special handling for oneOf. Subdefinitions are always an array 
+     * Special handling for oneOf. Subdefinitions are always an array
      * (see createOneOfUnion)
      */
     if (
-      existingDataDef.targetGraphQLType === TargetGraphQLType.oneOfUnion && 
-      Array.isArray(existingDataDef.subDefinitions) 
+      existingDataDef.targetGraphQLType === TargetGraphQLType.oneOfUnion &&
+      Array.isArray(existingDataDef.subDefinitions)
     ) {
       existingDataDef.subDefinitions.forEach((def) => {
           collapseLinksIntoDataDefinition({

packages/openapi-to-graphql/src/resolver_builder.ts

@@ -671,9 +671,9 @@ export function getResolver<TSource, TContext, TArgs>({
 
         if (form) {
           /**
-           * When there is a form, remove default content type and leave 
+           * When there is a form, remove default content type and leave
            * computation of content-type header to fetch
-           * 
+           *
            * See https://github.com/github/fetch/issues/505#issuecomment-293064470
            */
           Object.assign(options.headers, form.getHeaders())
@@ -1090,6 +1090,11 @@ function getAuthOptions<TSource, TContext, TArgs>(
               credentials
             ).toString('base64')}`
             break
+          case 'bearer':
+            const token =
+              _openAPIToGraphQL.security[sanitizedSecurityRequirement].token
+            authHeaders['Authorization'] = `Bearer ${token}`
+            break
           default:
             throw new Error(
               `Cannot recognize http security scheme ` +