diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..59588d3
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "simple-oss"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+description = "Simple Alibaba Cloud OSS Client in Rust"
+license = "MIT"
+readme="README.md"
+repository = "https://git.hatter.ink/hatter/simple-oss"
+
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rust-crypto = "0.2.36"
+urlencoding = "1.0.0"
+base64 = "0.11.0"
+reqwest = "0.9.22"
+rust_util="0.1.0"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..43a8a27
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,128 @@
+use std::{
+    fs::File,
+    time::SystemTime,
+};
+use crypto::{
+    mac::{
+        Mac,
+        MacResult,
+    },
+    hmac::Hmac,
+    sha1::Sha1,
+};
+use reqwest::{
+    Response,
+};
+use rust_util::*;
+
+pub const OSS_VERB_GET: &str = "GET";
+pub const OSS_VERB_PUT: &str = "PUT";
+pub const OSS_VERB_DELETE: &str = "DELETE";
+
+/// OSSClient - Alibaba Cloud OSS Client
+/// 
+/// Reference URL: https://help.aliyun.com/document_detail/31952.html
+pub struct OSSClient<'a> {
+    pub endpoint: &'a str,
+    pub access_key_id: &'a str,
+    pub access_key_secret: &'a str,
+}
+
+impl<'a> OSSClient<'a> {
+    pub fn new(endpoint: &'a str, access_key_id: &'a str, access_key_secret: &'a str) -> OSSClient<'a> {
+        OSSClient {
+            endpoint: endpoint,
+            access_key_id: access_key_id,
+            access_key_secret: access_key_secret,
+        }
+    }
+
+    pub fn put_file(&self, bucket_name: &str, key: &str, expire_in_seconds: u64, file: File) -> XResult<Response> {
+        let client = reqwest::Client::new();
+        Ok(client.put(&self.generate_signed_put_url(bucket_name, key, expire_in_seconds)).body(file).send()?)
+    }
+
+    pub fn delete_file(&self, bucket_name: &str, key: &str) -> XResult<Response> {
+        let delete_url = self.generate_signed_delete_url(bucket_name, key, 30_u64);
+        let client = reqwest::Client::new();
+        Ok(client.delete(&delete_url).send()?)
+    }
+
+    pub fn get_file_content(&self, bucket_name: &str, key: &str) -> XResult<Option<String>> {
+        let get_url = self.generate_signed_get_url(bucket_name, key, 30_u64);
+        let mut response = reqwest::get(&get_url)?;
+        match response.status().as_u16() {
+            404_u16 => Ok(None),
+            200_u16 => Ok(Some(response.text()?)),
+            _ => Err(new_box_ioerror(&format!("Error in read: {}/{}, returns: {:?}", bucket_name, key, response))),
+        }
+    }
+
+    pub fn put_file_content(&self, bucket_name: &str, key: &str, content: &str) -> XResult<Response> {
+        let put_url = self.generate_signed_put_url(bucket_name, key, 30_u64);
+        let client = reqwest::Client::new();
+        Ok(client.put(&put_url).body(content.as_bytes().to_vec()).send()?)
+    }
+
+    pub fn generate_signed_put_url(&self, bucket_name: &str, key: &str, expire_in_seconds: u64) -> String {
+        self.generate_signed_url(OSS_VERB_PUT, bucket_name, key, expire_in_seconds, true)
+    }
+
+    pub fn generate_signed_get_url(&self, bucket_name: &str, key: &str, expire_in_seconds: u64) -> String {
+        self.generate_signed_url(OSS_VERB_GET, bucket_name, key, expire_in_seconds, true)
+    }
+
+    pub fn generate_signed_delete_url(&self, bucket_name: &str, key: &str, expire_in_seconds: u64) -> String {
+        self.generate_signed_url(OSS_VERB_DELETE, bucket_name, key, expire_in_seconds, true)
+    }
+
+    pub fn generate_signed_url(&self, verb: &str, bucket_name: &str, key: &str, expire_in_seconds: u64, is_https: bool) -> String {
+        let mut signed_url = String::with_capacity(1024);
+        signed_url.push_str(if is_https { "https://" } else { "http://" });
+        signed_url.push_str(&format!("{}.{}/{}", bucket_name, self.endpoint, key));
+    
+        let current_secs = get_current_secs();
+        let expire_secs = current_secs + expire_in_seconds;
+    
+        signed_url.push_str("?Expires=");
+        signed_url.push_str(expire_secs.to_string().as_str());
+        signed_url.push_str("&OSSAccessKeyId=");
+        signed_url.push_str(&urlencoding::encode(self.access_key_id));
+        signed_url.push_str("&Signature=");
+    
+        let to_be_signed = get_to_be_signed(verb, expire_secs, bucket_name, key);
+        let signature = to_base64(calc_hmac_sha1(self.access_key_secret.as_bytes(), to_be_signed.as_bytes()));
+        signed_url.push_str(&urlencoding::encode(signature.as_str()));
+    
+        signed_url
+    }
+}
+
+fn get_to_be_signed(verb: &str, expire_secs: u64, bucket_name: &str, key: &str) -> String {
+    let mut to_be_signed = String::with_capacity(512);
+    to_be_signed.push_str(verb);
+    to_be_signed.push_str("\n");
+    to_be_signed.push_str("\n");
+    to_be_signed.push_str("\n");
+    to_be_signed.push_str(expire_secs.to_string().as_str());
+    to_be_signed.push_str("\n");
+    to_be_signed.push_str("/");
+    to_be_signed.push_str(bucket_name);
+    to_be_signed.push_str("/");
+    to_be_signed.push_str(key);
+    to_be_signed
+}
+
+fn to_base64(mac_result: MacResult) -> String {
+    base64::encode(mac_result.code())
+}
+
+fn calc_hmac_sha1(key: &[u8], message: &[u8]) -> MacResult {
+    let mut hmac = Hmac::new(Sha1::new(), key);
+    hmac.input(message);
+    hmac.result()
+}
+
+fn get_current_secs() -> u64 {
+    SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs()
+}