ここまで

Cargo.toml

@@ -6,3 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+bytes = "1.4.0"
+reqwest = { version = "0.11.16", features = ["json"] }
+serde = { version = "1.0.159", features = ["derive"] }

src/client.rs

@@ -0,0 +1,13 @@
+use crate::restapi::RestAPI;
+
+pub struct Client {
+    restapi: RestAPI,
+}
+
+impl Client {
+    pub fn new(base_path: String) -> Self {
+        Self {
+            restapi: RestAPI::new(base_path),
+        }
+    }
+}

src/lib.rs

@@ -1,3 +1,5 @@
+mod types;
+
 pub fn add(left: usize, right: usize) -> usize {
     left + right
 }

src/restapi.rs

@@ -0,0 +1,44 @@
+use reqwest::{Client, RequestBuilder, Result};
+use crate::types::audio_query::AudioQueryType;
+use bytes::Bytes;
+
+pub struct RestAPI {
+    base_path: String,
+    client: Client,
+}
+
+impl RestAPI {
+    pub fn new(base_path: String) -> Self {
+        Self {
+            base_path,
+            client: Client::new(),
+        }
+    }
+
+    pub fn request(&self, method: &str, path: &str) -> RequestBuilder {
+        self.client
+            .request(method.parse().unwrap(), &format!("{}{}", self.base_path, path))
+    }
+
+    pub async fn create_audio_query(&self, text: &str, core_version: Option<&str>) -> Result<AudioQueryType> {
+        let mut params = vec![("text", text)];
+        if let Some(core_version) = core_version {
+            params.push(("core_version", core_version))
+        }
+        self.request("POST", "/audio_query")
+            .param(&params)
+            .send()
+            .await?
+            .json()
+            .await?
+    }
+
+    pub async fn synthesis(&self, audio_query: &AudioQueryType) -> Result<Bytes> {
+        self.request("POST", "/synthesis")
+            .json(audio_query)
+            .send()
+            .await?
+            .bytes()
+            .await?
+    }
+}

src/types/audio_query.rs

@@ -0,0 +1,22 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct AudioQueryType {
+    #[serde(rename = "speedScale")]
+    speed_scale: i32,
+    #[serde(rename = "pitchScale")]
+    pitch_scale: i32,
+    #[serde(rename = "intonationScale")]
+    intonation_scale: i32,
+    #[serde(rename = "volumeScale")]
+    volume_scale: i32,
+    #[serde(rename = "prePhonemeLength")]
+    pre_phoneme_length: i32,
+    #[serde(rename = "postPhonemeLength")]
+    post_phoneme_length: i32,
+    #[serde(rename = "outputSamplingRate")]
+    output_sampling_rate: i32,
+    #[serde(rename = "outputStereo")]
+    output_stereo: bool,
+    kana: String,
+}

src/types/mod.rs

@@ -0,0 +1 @@
+mod audio_query;