reorganize docs; add page for customizing gateway output

grpc-ecosystem · johanbrandhorst · Nov 14, 2020 · Nov 13, 2020 · Nov 13, 2020 · 1189ad66a6bf916b8938dcbc01e775a7dcf6bff0
commit 1189ad66a6bf916b8938dcbc01e775a7dcf6bff0
diff --git a/docs/docs/contributing/contributing.md b/docs/docs/contributing/contributing.md
@@ -0,0 +1,9 @@
+---
+layout: default
+title: Getting Started
+parent: Contributing
+---
+
+# How do I contribute
+
+See CONTRIBUTING in [the repo](https://github.com/grpc-ecosystem/grpc-gateway/blob/master/CONTRIBUTING.md).
diff --git a/docs/docs/contributing/index.md b/docs/docs/contributing/index.md
@@ -0,0 +1,6 @@
+---
+layout: default
+title: Contributing
+nav_order: 5
+has_children: true
+---
diff --git a/docs/docs/season_of_docs.md → docs/docs/contributing/season_of_docs.md b/docs/docs/season_of_docs.md → docs/docs/contributing/season_of_docs.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: 2020 Season of Docs
-nav_order: 13
+parent: Contributing
 ---
 
 # 2020 Season of Docs

diff --git a/docs/docs/cygwin.md → docs/docs/development/cygwin.md b/docs/docs/cygwin.md → docs/docs/development/cygwin.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Installation for Cygwin
-nav_order: 5
+parent: Developing
+nav_order: 2
 ---
 
 # Installation for Cygwin

diff --git a/docs/docs/development/index.md b/docs/docs/development/index.md
@@ -0,0 +1,6 @@
+---
+layout: default
+title: Developing
+nav_order: 4
+has_children: true
+---
diff --git a/docs/docs/v2-migration.md → docs/docs/development/v2-migration.md b/docs/docs/v2-migration.md → docs/docs/development/v2-migration.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: gRPC-Gateway v2 migration guide
-nav_order: 17
+parent: Developing
+nav_order: 1
 ---
 
 # gRPC-Gateway v2 migration guide

diff --git a/docs/docs/mapping/customizingopenapioutput.md b/docs/docs/mapping/customizingopenapioutput.md
@@ -0,0 +1,203 @@
+---
+layout: default
+title: Customizing OpenAPI Ouptut
+parent: Mapping
+nav_order: 5
+---
+
+{% raw %}
+
+# In proto comments
+
+You can provide comments directly in your Protocol Buffer defintions and they will be translated into comments in the generated OpenAPI definitions:
+
+```protobuf
+message MyMessage {
+  // This comment will end up direcly in your Open API definition
+  string uuid = 1 [(grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {description: "The UUID field."}];
+}
+```
+
+# Using proto options
+
+You can define options on your Protocol Buffer services, operations, messages, and field definitions to customize your Open API output. For instance, to customize the [OpenAPI Schema Object](https://swagger.io/specification/v2/#schemaObject) for messages and fields:
+
+```protobuf
+import "protoc-gen-openapiv2/options/annotations.proto";
+
+message ABitOfEverything {
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_schema) = {
+        json_schema: {
+            title: "A bit of everything"
+            description: "Intentionaly complicated message type to cover many features of Protobuf."
+            required: ["uuid", "int64_value", "double_value"]
+        }
+        external_docs: {
+            url: "https://github.com/grpc-ecosystem/grpc-gateway";
+            description: "Find out more about ABitOfEverything";
+        }
+        example: "{\"uuid\": \"0cf361e1-4b44-483d-a159-54dabdf7e814\"}"
+    };
+
+    string uuid = 1 [(grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {description: "The UUID field."}];
+}
+```
+
+Operations can also be customized:
+
+```protobuf
+service ABitOfEverythingService { 
+   rpc Delete(grpc.gateway.examples.internal.proto.sub2.IdMessage) returns (google.protobuf.Empty) {
+        option (google.api.http) = {
+            delete: "/v1/example/a_bit_of_everything/{uuid}"
+        };
+        option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+            security: {
+                security_requirement: {
+                    key: "ApiKeyAuth";
+                    value: {}
+                }
+                security_requirement: {
+                    key: "OAuth2";
+                    value: {
+                        scope: "read";
+                        scope: "write";
+                    }
+                }
+            }
+            extensions: {
+                key: "x-irreversible";
+                value {
+                    bool_value: true;
+                }
+            }
+        };
+    }
+}
+```
+
+Please see this [example](https://github.com/grpc-ecosystem/grpc-gateway/blob/master/examples/internal/proto/examplepb/a_bit_of_everything.proto) for examples of the options being used.
+
+# Using google.api.field_behavior
+
+Google provides an [field option](https://github.com/googleapis/googleapis/blob/master/google/api/field_behavior.proto) for defining the behavior of fields that is also supported:
+
+```protobuf
+import "google/api/field_behavior.proto";
+
+message MyMessage {
+    string a_required_field = 1 [(google.api.field_behavior) = REQUIRED];
+}
+```
+
+The following options are used in the Open API output:
+
+* `REQUIRED` - marks a field as required
+* `OUTPUT_ONLY` - marks a field as readonly
+
+Google defines a couple other options - `OPTIONAL`, `IMMUTABLE`, `INPUT_ONLY` - that are not currently used. `OPTIONAL` support is currently under discussion in [this issue](https://github.com/grpc-ec system/grpc-gateway/issues/669). For `IMMUTABLE` and `INPUT_ONLY` fields, there is an [open issue](https://github.com/OAI/OpenAPI-Specification/issues/1497) in the Open API specification for adding functionality for write once or immutable fields to the spec.
+
+# Using go templates in protofile comments
+
+Use [Go templates](https://golang.org/pkg/text/template/)
+in your protofile comments to allow more advanced documentation such
+as:
+
+- Documentation about fields in the proto objects.
+- Import the content of external files (such as
+  [Markdown](https://en.wikipedia.org/wiki/Markdown)).
+
+## How to use it
+
+By default this function is turned off, so if you want to use it you
+have to add the `use_go_templates` option:
+
+```shell
+--openapiv2_out . --openapiv2_opt use_go_templates=true
+```
+
+or:
+
+```shell
+--openapiv2_out=use_go_templates=true:.
+```
+
+### Example script
+
+Example of a bash script with the `use_go_templates` flag set to true:
+
+```shell
+$ protoc -I. \
+    --go_out . --go-grpc_out . \
+    --grpc-gateway_out . --grpc-gateway_opt logtostderr=true \
+    --openapiv2_out . \
+    --openapiv2_opt logtostderr=true \
+    --openapiv2_opt use_go_templates=true \
+    path/to/my/proto/v1/myproto.proto
+```
+
+### Example proto file
+
+Example of a protofile with Go templates. This proto file imports documentation from another file, `tables.md`:
+
+```protobuf
+service LoginService {
+    // Login
+    //
+    // {{.MethodDescriptorProto.Name}} is a call with the method(s) {{$first := true}}{{range .Bindings}}{{if $first}}{{$first = false}}{{else}}, {{end}}{{.HTTPMethod}}{{end}} within the "{{.Service.Name}}" service.
+    // It takes in "{{.RequestType.Name}}" and returns a "{{.ResponseType.Name}}".
+    //
+    // {{import "tables.md"}}
+    rpc Login (LoginRequest) returns (LoginReply) {
+        option (google.api.http) = {
+            post: "/v1/example/login"
+            body: "*"
+        };
+    }
+}
+
+message LoginRequest {
+    // The entered username
+    string username = 1;
+    // The entered password
+    string password = 2;
+}
+
+message LoginReply {
+    // Whether you have access or not
+    bool access = 1;
+}
+```
+
+The content of `tables.md`:
+
+```markdown
+## {{.RequestType.Name}}
+| Field ID    | Name      | Type                                                       | Description                  |
+| ----------- | --------- | ---------------------------------------------------------  | ---------------------------- | {{range .RequestType.Fields}}
+| {{.Number}} | {{.Name}} | {{if eq .Label.String "LABEL_REPEATED"}}[]{{end}}{{.Type}} | {{fieldcomments .Message .}} | {{end}}  
+
+## {{.ResponseType.Name}}
+| Field ID    | Name      | Type                                                       | Description                  |
+| ----------- | --------- | ---------------------------------------------------------- | ---------------------------- | {{range .ResponseType.Fields}}
+| {{.Number}} | {{.Name}} | {{if eq .Label.String "LABEL_REPEATED"}}[]{{end}}{{.Type}} | {{fieldcomments .Message .}} | {{end}}  
+```
+
+## OpenAPI output
+
+### SwaggerUI
+
+This is how the OpenAPI file would be rendered in [Swagger UI](https://swagger.io/tools/swagger-ui/)
+
+![Screenshot OpenAPI file in SwaggerUI](../assets/images/gotemplates/swaggerui.png)
+
+### Postman
+
+This is how the OpenAPI file would be rendered in [Postman](https://www.getpostman.com/)
+
+![Screenshot OpenAPI file in Postman](../assets/images/gotemplates/postman.png)
+
+For a more detailed example of a protofile that has Go templates enabled,
+[see the examples](https://github.com/grpc-ecosystem/grpc-gateway/blob/master/examples/internal/proto/examplepb/use_go_template.proto).
+
+{% endraw %}
diff --git a/docs/docs/customizingyourgateway.md → docs/docs/mapping/customizingyourgateway.md b/docs/docs/customizingyourgateway.md → docs/docs/mapping/customizingyourgateway.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Customizing your gateway
-nav_order: 4
+parent: Mapping
+nav_order: 10
 ---
 
 # Customizing your gateway

diff --git a/docs/docs/examples.md → docs/docs/mapping/examples.md b/docs/docs/examples.md → docs/docs/mapping/examples.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Examples
-nav_order: 6
+parent: Mapping
+nav_order: 1
 ---
 
 # Examples

diff --git a/docs/docs/grpcapiconfiguration.md → docs/docs/mapping/grpcapiconfiguration.md b/docs/docs/grpcapiconfiguration.md → docs/docs/mapping/grpcapiconfiguration.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: gRPC API Configuration
-nav_order: 8
+parent: Mapping
+nav_order: 4
 ---
 
 # gRPC API Configuration

diff --git a/docs/docs/httpbody.md → docs/docs/mapping/httpbody.md b/docs/docs/httpbody.md → docs/docs/mapping/httpbody.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: HttpBody messages
-nav_order: 10
+parent: Mapping
+nav_order: 2
 ---
 
 # HttpBody messages

diff --git a/docs/docs/mapping/index.md b/docs/docs/mapping/index.md
@@ -0,0 +1,6 @@
+---
+layout: default
+title: Mapping
+nav_order: 2
+has_children: true
+---
diff --git a/docs/docs/patch.md → docs/docs/mapping/patch.md b/docs/docs/patch.md → docs/docs/mapping/patch.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Patch Feature
-nav_order: 12
+parent: Mapping
+nav_order: 3
 ---
 
 # Patch Feature

diff --git a/docs/docs/aws.md → docs/docs/operations/aws.md b/docs/docs/aws.md → docs/docs/operations/aws.md
@@ -1,7 +1,8 @@
 ---
 layout: default
-title: AWS
-nav_order: 2
+title: AWS Gateway Integration
+parent: Operations
+nav_order: 5
 ---
 
 # AWS

diff --git a/docs/docs/healthcheck.md → docs/docs/operations/healthcheck.md b/docs/docs/healthcheck.md → docs/docs/operations/healthcheck.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Health Check
-nav_order: 9
+parent: Operations
+nav_order: 3
 ---
 
 # Health check

diff --git a/docs/docs/operations/index.md b/docs/docs/operations/index.md
@@ -0,0 +1,6 @@
+---
+layout: default
+title: Operations
+nav_order: 3
+has_children: true
+---
diff --git a/docs/docs/inject_router.md → docs/docs/operations/inject_router.md b/docs/docs/inject_router.md → docs/docs/operations/inject_router.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Adding custom routes to the mux
-nav_order: 11
+parent: Operations
+nav_order: 2
 ---
 
 # Adding custom routes to the mux

diff --git a/docs/docs/tracing.md → docs/docs/operations/tracing.md b/docs/docs/tracing.md → docs/docs/operations/tracing.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: Tracing
-nav_order: 14
+parent: Operations
+nav_order: 4
 ---
 
 # Tracing

diff --git a/docs/docs/background.md → docs/docs/overview/background.md b/docs/docs/background.md → docs/docs/overview/background.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Background
-nav_order: 3
+parent: Overview
 ---
 
 # Background

diff --git a/docs/docs/overview/index.md b/docs/docs/overview/index.md
@@ -0,0 +1,6 @@
+---
+layout: default
+title: Overview
+nav_order: 1
+has_children: true
+---
diff --git a/docs/docs/usage.md → docs/docs/overview/usage.md b/docs/docs/usage.md → docs/docs/overview/usage.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: How do I use this?
-nav_order: 15
+parent: Overview
 ---
 
 # How do I use this?