[Rust-Axum] Fix uuid in header params causing compilation errors (#18563)

* fix: Fix uuid in header params causing errors

Routes with header parameters with a `format` of `uuid` in the openAPI
specification used to cause a compilation error in the resulting
Rust Axum code.
This commit fixes the issue by including the correct conversion trait
implementation on the condition that at least one header parameter of
`format` `uuid` is included in the specification.

* refactor: Add final to boolean

* fix: Bring str::FromStr optionally into scope

The trait needs to be in scope for the TryFrom implementation:
`TryFrom<HeaderValue> for IntoHeaderValue<uuid::Uuid> `
It will only be brought into scope when the implementation is rendered.

* test: Add integration test and its specification

This commit adds an integration test that tests the bug fix for #18554.
A header parameter of `format: uuid` is included in one route.
This makes the example create a route handler that tries to extract a
Rust `uuid::Uuid` type from the header. The integration test will check
that the generated code compiles.

* test: Update examples and run integration test

The generated samples are updated with:
`./bin/generate-samples.sh ./bin/configs/manual/*.yaml`
Most example projects have their version numbers bumped. Some changes
show, that there are some other unrelated changes to the files, which
indicates that some prior commit did not update the samples accordingly.
The relevant integration test
`mvn integration-test -f samples/server/petstore/rust-axum/pom.xml`
passes.

Author: myz-dev

bin/configs/manual/rust-axum-header-uuid.yaml

@@ -0,0 +1,9 @@
+generatorName: rust-axum
+outputDir: samples/server/petstore/rust-axum/output/rust-axum-header-uuid
+inputSpec: modules/openapi-generator/src/test/resources/3_0/rust-axum/rust-axum-header-uuid.yaml
+templateDir: modules/openapi-generator/src/main/resources/rust-axum
+generateAliasAsModel: true
+additionalProperties:
+  hideGenerationTimestamp: "true"
+  packageName: rust-axum-header-uui
+enablePostProcessFile: true

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustAxumServerCodegen.java

@@ -45,6 +45,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.io.ObjectInputFilter.Config;
 import java.math.BigInteger;
 import java.nio.file.Path;
 import java.util.*;
@@ -552,6 +553,12 @@ public CodegenOperation fromOperation(String path, String httpMethod, Operation
             }
         }
 
+        // Include renderUuidConversionImpl exactly once in the vendorExtensions map when 
+        // at least one `uuid::Uuid` converted from a header value in the resulting Rust code. 
+        final Boolean renderUuidConversionImpl = op.headerParams.stream().anyMatch(h -> h.getDataType().equals(uuidType));
+        if (renderUuidConversionImpl) {
+            additionalProperties.put("renderUuidConversionImpl", "true");
+        }        
         return op;
     }
 

modules/openapi-generator/src/main/resources/rust-axum/header.mustache

@@ -1,4 +1,4 @@
-use std::{convert::TryFrom, fmt, ops::Deref};
+use std::{convert::TryFrom, fmt, ops::Deref{{#renderUuidConversionImpl}}, str::FromStr{{/renderUuidConversionImpl}}};
 
 use chrono::{DateTime, Utc};
 use http::HeaderValue;
@@ -178,3 +178,39 @@ impl TryFrom<IntoHeaderValue<DateTime<Utc>>> for HeaderValue {
         }
     }
 }
+
+{{#renderUuidConversionImpl}}
+// uuid::Uuid
+
+impl TryFrom<HeaderValue> for IntoHeaderValue<uuid::Uuid> {
+    type Error = String;
+
+    fn try_from(hdr_value: HeaderValue) -> Result<Self, Self::Error> {
+        match hdr_value.to_str() {
+            Ok(hdr_value) => match uuid::Uuid::from_str(hdr_value) {
+                Ok(uuid) => Ok(IntoHeaderValue(uuid)),
+                Err(e) => Err(format!("Unable to parse: {} as uuid - {}", hdr_value, e)),
+            },
+            Err(e) => Err(format!(
+                "Unable to convert header {:?} to string {}",
+                hdr_value, e
+            )),
+        }
+    }
+}
+
+impl TryFrom<IntoHeaderValue<uuid::Uuid>> for HeaderValue {
+    type Error = String;
+
+    fn try_from(hdr_value: IntoHeaderValue<uuid::Uuid>) -> Result<Self, Self::Error> {
+        match HeaderValue::from_bytes(hdr_value.0.as_bytes()) {
+            Ok(hdr_value) => Ok(hdr_value),
+            Err(e) => Err(format!(
+                "Unable to convert {:?} to a header: {}",
+                hdr_value, e
+            )),
+        }
+    }
+}
+
+{{/renderUuidConversionImpl}}

modules/openapi-generator/src/test/resources/3_0/rust-axum/rust-axum-header-uuid.yaml

@@ -0,0 +1,32 @@
+# Test deserialization of uuid objects in headers
+openapi: 3.0.0
+info:
+  title: Sample API
+  version: 0.1.9
+paths:
+  /users:
+    post:
+      description: Adds a user to the users database table.
+      parameters: 
+        - $ref: "#/components/parameters/UuidHeaderParam"
+      responses:
+        "201": # status code
+          description: Added row to table!
+          content:
+            application/json:
+              schema:
+                type: string 
+components:
+  schemas: 
+      HeaderUuid:
+        type: string
+        format: uuid
+        example: a9f5a638-728c-479d-af9b-016eb8049ab6
+  parameters: 
+    UuidHeaderParam:
+      name: some_uid
+      in: header
+      required: true
+      description: A uuid transmitted in the header.
+      schema:
+        $ref: "#/components/schemas/HeaderUuid"

samples/server/petstore/rust-axum/output/multipart-v3/.openapi-generator/VERSION

@@ -1 +1 @@
-7.5.0-SNAPSHOT
+7.6.0-SNAPSHOT

samples/server/petstore/rust-axum/output/multipart-v3/README.md

@@ -12,7 +12,7 @@ server, you can easily generate a server stub.
 To see how to make this your own, look here: [README]((https://openapi-generator.tech))
 
 - API version: 1.0.7
-- Generator version: 7.5.0-SNAPSHOT
+- Generator version: 7.6.0-SNAPSHOT
 
 
 

samples/server/petstore/rust-axum/output/openapi-v3/.openapi-generator/VERSION

@@ -1 +1 @@
-7.5.0-SNAPSHOT
+7.6.0-SNAPSHOT

samples/server/petstore/rust-axum/output/openapi-v3/README.md

@@ -12,7 +12,7 @@ server, you can easily generate a server stub.
 To see how to make this your own, look here: [README]((https://openapi-generator.tech))
 
 - API version: 1.0.7
-- Generator version: 7.5.0-SNAPSHOT
+- Generator version: 7.6.0-SNAPSHOT
 
 
 

samples/server/petstore/rust-axum/output/ops-v3/.openapi-generator/VERSION

@@ -1 +1 @@
-7.5.0-SNAPSHOT
+7.6.0-SNAPSHOT

samples/server/petstore/rust-axum/output/ops-v3/README.md

@@ -12,7 +12,7 @@ server, you can easily generate a server stub.
 To see how to make this your own, look here: [README]((https://openapi-generator.tech))
 
 - API version: 0.0.1
-- Generator version: 7.5.0-SNAPSHOT
+- Generator version: 7.6.0-SNAPSHOT
 
 
 

samples/server/petstore/rust-axum/output/petstore-with-fake-endpoints-models-for-testing/.openapi-generator/VERSION

@@ -1 +1 @@
-7.5.0-SNAPSHOT
+7.6.0-SNAPSHOT

samples/server/petstore/rust-axum/output/petstore-with-fake-endpoints-models-for-testing/README.md

@@ -12,7 +12,7 @@ server, you can easily generate a server stub.
 To see how to make this your own, look here: [README]((https://openapi-generator.tech))
 
 - API version: 1.0.0
-- Generator version: 7.5.0-SNAPSHOT
+- Generator version: 7.6.0-SNAPSHOT
 
 
 

samples/server/petstore/rust-axum/output/petstore-with-fake-endpoints-models-for-testing/src/lib.rs

@@ -445,6 +445,7 @@ pub trait Api {
         method: Method,
         host: Host,
         cookies: CookieJar,
+        body: models::TestEndpointParametersRequest,
     ) -> Result<TestEndpointParametersResponse, String>;
 
     /// To test enum parameters.
@@ -457,6 +458,7 @@ pub trait Api {
         cookies: CookieJar,
         header_params: models::TestEnumParametersHeaderParams,
         query_params: models::TestEnumParametersQueryParams,
+        body: Option<models::TestEnumParametersRequest>,
     ) -> Result<TestEnumParametersResponse, String>;
 
     /// test inline additionalProperties.
@@ -478,6 +480,7 @@ pub trait Api {
         method: Method,
         host: Host,
         cookies: CookieJar,
+        body: models::TestJsonFormDataRequest,
     ) -> Result<TestJsonFormDataResponse, String>;
 
     /// To test class name in snake case.
@@ -567,6 +570,7 @@ pub trait Api {
         host: Host,
         cookies: CookieJar,
         path_params: models::UpdatePetWithFormPathParams,
+        body: Option<models::UpdatePetWithFormRequest>,
     ) -> Result<UpdatePetWithFormResponse, String>;
 
     /// uploads an image.