obs_sdk/
lib.rs

1//! # 使用说明
2//! 
3//! ## 1. 列举桶内对象列表
4//! 
5//! ```rust
6//! use obs_sdk::ObsClient;
7//! 
8//! static ENDPOINT: &str = "obs.cn-north-4.myhuaweicloud.com";
9//! static AK: &str = "YOUR_AK";
10//! static SK: &str = "YOUR_SK";
11//! static BUCKET_NAME: &str = "bucket_name";
12//! 
13//! #[tokio::test]
14//! async fn test_list_prefix() -> Result<(), Box<dyn std::error::Error>> {
15//!     let client = ObsClient {
16//!         endpoint: ENDPOINT.to_string(),
17//!         ak: AK.to_string(),
18//!         sk: SK.to_string(),
19//!         bucket: BUCKET_NAME.to_string(),
20//!     };
21//!     let res = client.list("tmp").await?;
22//!     println!("{:?}", res);
23//!     Ok(())
24//! }
25//! ```
26//! 
27//! ## 2. 上传对象到桶
28//! 
29//! ```rust
30//! use obs_sdk::ObsClient;
31//! 
32//! static ENDPOINT: &str = "obs.cn-north-4.myhuaweicloud.com";
33//! static AK: &str = "YOUR_AK";
34//! static SK: &str = "YOUR_SK";
35//! static BUCKET_NAME: &str = "bucket_name";
36//! 
37//! #[tokio::test]
38//! async fn test_upload_object() -> Result<(), Box<dyn std::error::Error>> {
39//!     let client = ObsClient {
40//!         endpoint: ENDPOINT.to_string(),
41//!         ak: AK.to_string(),
42//!         sk: SK.to_string(),
43//!         bucket: BUCKET_NAME.to_string(),
44//!     };
45//!     let res = client.upload_file("tmp_cargo.txt", "Cargo.txt").await?;
46//!     println!("{:?}", res);
47//!     Ok(())
48//! }
49//! ```
50//! 
51//! ## 3. 下载对象到本地目录
52//! 
53//! ```rust
54//! use obs_sdk::ObsClient;
55//! 
56//! static ENDPOINT: &str = "obs.cn-north-4.myhuaweicloud.com";
57//! static AK: &str = "YOUR_AK";
58//! static SK: &str = "YOUR_SK";
59//! static BUCKET_NAME: &str = "bucket_name";
60//! 
61//! #[tokio::test]
62//! async fn test_download_file02() -> Result<(), Box<dyn std::error::Error>> {
63//!     let client = ObsClient {
64//!         endpoint: ENDPOINT.to_string(),
65//!         ak: AK.to_string(),
66//!         sk: SK.to_string(),
67//!         bucket: BUCKET_NAME.to_string(),
68//!     };
69//!     let res = client.download_file("2hls_stutter-10.mp4", "video/2hls_stutter-10.mp4", false).await;
70//!     res
71//! }
72//! ```
73//! 
74//! ## 4. 下载对象为字节内容
75//! 
76//! ```rust
77//! use obs_sdk::ObsClient;
78//! 
79//! static ENDPOINT: &str = "obs.cn-north-4.myhuaweicloud.com";
80//! static AK: &str = "YOUR_AK";
81//! static SK: &str = "YOUR_SK";
82//! static BUCKET_NAME: &str = "bucket_name";
83//! 
84//! #[tokio::test]
85//! async fn test_download_file01() -> Result<(), Box<dyn std::error::Error>> {
86//!     let client = ObsClient {
87//!         endpoint: ENDPOINT.to_string(),
88//!         ak: AK.to_string(),
89//!         sk: SK.to_string(),
90//!         bucket: BUCKET_NAME.to_string(),
91//!     };
92//!     let data = client.download_object("2hls_stutter-10.mp4").await?;
93//!     let file_path = Path::new("output.mp4");
94//!     match fs::write(file_path, data) {
95//!         Ok(_) => println!("文件保存成功{:?}", file_path),
96//!         Err(e) => eprintln!("文件保存失败:{}", e)
97//!     }
98//!     Ok(())
99//! }
100//! ```
101//! 
102//! ## 5. url鉴权
103//! 
104//! ```rust
105//! use obs_sdk::ObsClient;
106//!
107//! static ENDPOINT: &str = "obs.cn-north-4.myhuaweicloud.com";
108//! static AK: &str = "YOUR_AK";
109//! static SK: &str = "YOUR_SK";
110//! static BUCKET_NAME: &str = "bucket_name";
111//! 
112//! #[test]
113//! fn test_url_sign() -> Result<(), Box<dyn std::error::Error>> {
114//!     let client = ObsClient {
115//!         endpoint: ENDPOINT.to_string(),
116//!         ak: AK.to_string(),
117//!         sk: SK.to_string(),
118//!         bucket: BUCKET_NAME.to_string(),
119//!     };
120//!     let sign_url = client.url_sign("https://ranfs.obs.cn-north-4.myhuaweicloud.com/tmp_cargo.txt")?;
121//!     println!("sign_url = {}", sign_url);
122//!     Ok(())
123//! }
124//! ```
125//! 
126mod utils;
127mod algorithm;
128
129use algorithm::HmacSha1;
130use std::fs;
131use std::path::Path;
132use std::io::{Error, ErrorKind};
133use serde::{Serialize, Deserialize};
134use regex::Regex;
135use std::vec::Vec;
136use url::{Url, form_urlencoded};
137use chrono::Local;
138
139/// 华为云OBS客户端
140/// 
141pub struct ObsClient {
142    pub endpoint: String,
143    pub ak: String,
144    pub sk: String,
145    pub bucket: String,
146}
147
148impl ObsClient {
149
150    /// 列举指定前缀开头的所有对象元数据，方法内部会构造http请求：
151    /// ```plain
152    /// GET / HTTP/1.1
153    /// Host: bucketname.obs.cn-north-4.myhuaweicloud.com
154    /// Date: date
155    /// Authorization: authorization
156    /// ```
157    /// 
158    pub async fn list(&self, prefix: &str) -> Result<Vec<ObjectMeta>, Box<dyn std::error::Error>> {
159        // 构造完整的url地址
160        let url = format!("https://{}.{}/?prefix={}", self.bucket, self.endpoint, prefix);
161
162        //  获取GMT格式的时间字符串
163        let date = utils::now_str_gmt();
164
165        // 创建HmacSha1对象
166        let hmacsha1 = HmacSha1();
167
168        // 构造签名用的原始字符串
169        let string_to_sign = hmacsha1.header_string_to_sign("GET", "", "", &date, "",  &format!("/{}/", self.bucket));
170
171        // 根据原始字符串+ak，获取header签名
172        let signature = hmacsha1.sign_to_base64string(&string_to_sign, &self.sk);
173
174        // 构造请求头Authorization的值
175        let authorization = format!("OBS {}:{}", self.ak, signature);
176        // 构造http请求
177        let client = reqwest::Client::new();
178        let res = client.get(url)
179            .header("Date", &date)
180            .header("Authorization", &authorization)
181            .send()
182            .await?;
183
184        // 如果请求成功，则返回字节内容
185        if res.status().is_success() {
186            let xml_content_string = res.text().await?;
187            let results = XmlParser::new(&xml_content_string).parse();
188            return Ok(results);
189        }
190
191        Err(Box::new(Error::new(ErrorKind::Other, format!("请求失败，状态码={}", res.status()))))
192    }
193
194    /// 上传对象
195    /// 
196    /// 方法内部构建请求
197    /// ```plain
198    /// PUT /object01 HTTP/1.1
199    /// User-Agent: curl/7.29.0
200    /// Host: examplebucket.obs.cn-north-4.myhuaweicloud.com
201    /// Accept: */*
202    /// Date: WED, 01 Jul 2015 04:11:15 GMT
203    /// Authorization: OBS H4IPJX0TQTHTHEBQQCEC:gYqplLq30dEX7GMi2qFWyjdFsyw=
204    /// Content-Length: 10240
205    /// Expect: 100-continue
206    /// 
207    /// [1024 Byte data content]
208    /// ```
209    /// 
210    pub async fn upload_object(&self, obj_key: &str, data: Vec<u8>) -> Result<(), Box<dyn std::error::Error>> {
211        // 构造完整的url地址
212        let url = format!("https://{}.{}/{}", self.bucket, self.endpoint, obj_key);
213
214        let md5_string = utils::base64_md5_str(&data);
215
216        //  获取GMT格式的时间字符串
217        let date = utils::now_str_gmt();
218
219        // 创建HmacSha1对象
220        let hmacsha1 = HmacSha1();
221
222        let file_type = utils::get_mime_type_from_extension(obj_key)
223            .expect("资源对应类型暂不支持上传，请在方法get_mime_type_from_extension中添加文件类型");
224
225        // 构造签名用的原始字符串
226        let string_to_sign = hmacsha1.header_string_to_sign("PUT", &md5_string, file_type, &date, "",  &format!("/{}/{}", self.bucket, obj_key));
227
228        // 根据原始字符串+ak，获取header签名
229        let signature = hmacsha1.sign_to_base64string(&string_to_sign, &self.sk);
230
231        // 构造请求头Authorization的值
232        let authorization = format!("OBS {}:{}", self.ak, signature);
233
234        // 构造http请求
235        let client = reqwest::Client::new();
236        println!("url = {}", url);
237        let res = client.put(url)
238            .header("Content-MD5", &md5_string)
239            .header("Date", &date)
240            .header("Content-Type", file_type)
241            .header("Content-Length", data.len())
242            .header("Authorization", authorization)
243            .body(data)
244            .send()
245            .await;
246
247        let res = match res {
248            Ok(response) => response,
249            Err(e) => {
250                return Err(Box::new(std::io::Error::new(std::io::ErrorKind::Other, e)));
251            },
252        };
253        let status = res.status();
254        println!("status = {}, {}", status, res.text_with_charset("utf-8").await?);
255
256        Ok(())
257
258    }
259
260    /// 上传文件
261    pub async fn upload_file(&self, obj_key: &str, file_path: &str) -> Result<(), Box<dyn std::error::Error>> {
262        let data = fs::read(file_path)?;
263        self.upload_object(obj_key, data).await
264    }
265
266    /// 下载对象，方法内部会构造http请求：
267    /// ```plain
268    /// GET /{obj_key} HTTP/1.1
269    /// Host: {bucket}.obs.cn-north-4.myhuaweicloud.com
270    /// Date: {date}
271    /// ```
272    /// 
273    pub async fn download_object(&self, obj_key: &str) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
274
275        // 构造完整的url地址
276        let url = format!("https://{}.{}/{}", self.bucket, self.endpoint, obj_key);
277
278        //  获取GMT格式的时间字符串
279        let date = utils::now_str_gmt();
280
281        // 创建HmacSha1对象
282        let hmacsha1 = HmacSha1();
283
284        // 构造签名用的原始字符串
285        let string_to_sign = hmacsha1.header_string_to_sign("GET", "", "", &date, "",  &format!("/{}/{}", self.bucket, obj_key));
286
287        // 根据原始字符串+ak，获取header签名
288        let signature = hmacsha1.sign_to_base64string(&string_to_sign, &self.sk);
289
290        // 构造请求头Authorization的值
291        let authorization = format!("OBS {}:{}", self.ak, signature);
292
293        // 构造http请求
294        let client = reqwest::Client::new();
295        let res = client.get(url)
296            .header("Authorization", &authorization)
297            .header("Date", &date)
298            .send()
299            .await?;
300
301        // 如果请求成功，则返回字节内容
302        if res.status().is_success() {
303            return Ok(res.bytes().await?.to_vec());
304        }
305        
306        Err(Box::new(Error::new(ErrorKind::Other, format!("请求失败，状态码={}", res.status()))))
307    }
308
309
310    /// 下载文件，并指定本地保存用的文件路径
311    /// 
312    /// # 参数
313    /// 
314    /// `overwrite` - 是否覆盖，true，当文件存在时，覆盖文件，false，当文件存在时，不覆盖文件
315    /// 
316    pub async fn download_file(&self, obj_key: &str, file_path: &str, overwrite: bool) -> Result<(), Box<dyn std::error::Error>> {
317        let file_path = Path::new(file_path);
318
319        // 判断文件是否存在，如果存在，不做任何操作
320        if file_path.exists() && !overwrite {
321            return Err(Box::new(Error::new(ErrorKind::AlreadyExists, "文件已存在，请删除文件或设置覆盖参数")));
322        }
323
324        // 根据父目录是否存在，选择性创建父目录
325        let parent = file_path.parent().unwrap();
326        if !parent.exists() {
327            fs::create_dir_all(&parent)?;
328        }
329
330        // 下载文件，得到原始文件字节内容
331        let data = self.download_object(obj_key).await?;
332        
333        // 保存文件
334        fs::write(file_path, data)?;
335        Ok(())
336    }
337
338    pub fn url_sign(&self, url_str: &str) -> Result<String, Box<dyn std::error::Error>> {
339        let obs_object_url = Url::parse(url_str)?;
340        let resource_part = obs_object_url.path();
341        let host = obs_object_url.host().unwrap();
342        let domain = match host {
343            url::Host::Domain(domain) => domain.to_string(),
344            _ => format!("{}.{}", self.bucket, self.endpoint)
345        };
346        let parts: Vec<&str> = domain.split(".").collect();
347        let bucket_name = parts[0];
348
349        let timestamp = utils::timestamp(Local::now(), 3600*2);
350
351        //  获取GMT格式的时间字符串
352        let expires = format!("{}", timestamp);
353
354        // 创建HmacSha1对象
355        let hmacsha1 = HmacSha1();
356
357        // 构造签名用的原始字符串
358        let string_to_sign = hmacsha1.url_string_to_sign("GET", "", "", &expires, "",  &format!("/{}{}", bucket_name, resource_part));
359
360        // 根据原始字符串+ak，获取header签名
361        let signature = hmacsha1.sign_to_base64string(&string_to_sign, &self.sk);
362        let signature = form_urlencoded::byte_serialize(signature.as_bytes()).collect::<String>();
363
364        // 构造url
365        let sign_url = format!("{}?AccessKeyId={}&Expires={}&Signature={}", url_str, self.ak, expires, signature);
366        Ok(sign_url)
367    }
368
369}
370
371
372/// obs对象的元数据信息
373/// 
374/// 这个结构体用于表示 OBS 对象的元数据，包含对象的各种属性，如名称、修改时间、内容标识、大小以及存储类型。
375#[derive(Serialize, Deserialize, Debug)]
376pub struct ObjectMeta {
377
378    /// 对象名
379    /// 
380    /// 唯一标识 OBS 存储中的对象
381    pub key: String,
382
383    /// 对象最近一次被修改的时间（UTC时间）
384    /// 
385    /// 该时间戳表示对象在 OBS 存储中最后一次被修改的时刻，采用 UTC 时间格式。
386    pub last_modified: String,
387
388    /// 对象的base64编码的128位MD5摘要
389    /// 
390    /// 这个 ETag 值是对象内容的唯一标识，可以通过该值识别对象内容是否有变化。
391    pub etag: String,
392
393    /// 对象的字节数
394    /// 
395    /// 表示对象在存储中占用的字节大小
396    pub size: u64,
397
398    /// 对象的存储类型：STANDARD，WARM，COLD，DEEP_ARCHIVE
399    /// 
400    /// 不同的存储类型对应不同的存储成本和访问性能，用户可以根据对象的访问频率等因素选择合适的存储类型
401    pub storage_class: String,
402}
403
404/// XML解析器
405/// 
406/// 用于解析XML格式的响应数据，目前这里面针对obs的接口“列举桶内对象”的响应结果进行解析，没有进行通用的xml解析，其不能作为通用工具使用
407struct XmlParser { 
408    xml: String,
409}
410
411
412impl XmlParser {
413    fn new(xml: &str) -> Self {
414        XmlParser { xml: xml.to_string() }
415    }
416
417    /// 解析obs接口“列举桶内对象”的响应结果
418    /// 
419    /// 该内部采用正则表达式进行解析，因此依赖外部的regex库
420    fn parse(&self) -> Vec<ObjectMeta> {
421        let xml = &self.xml;
422
423        // 定义解析需要使用的正则表达式
424        let contents_re = Regex::new(r#"<Contents>(.*?)</Contents>"#).unwrap();
425        let key_regex = Regex::new(r#"<Key>(.*?)</Key>"#).unwrap();
426        let last_modified_regex = Regex::new(r#"<LastModified>(.*?)</LastModified>"#).unwrap();
427        let etag_regex = Regex::new(r#"<ETag>(.*?)</ETag>"#).unwrap();
428        let size_regex = Regex::new(r#"<Size>(.*?)</Size>"#).unwrap();
429        let storage_class_regex = Regex::new(r#"<StorageClass>(.*?)</StorageClass>"#).unwrap();
430
431
432        // 解析Contents标签内的数据
433        let mut contents_vec = Vec::new();
434        for captures in contents_re.captures_iter(xml) {
435            let inner_content = &captures[1];
436
437            let key = key_regex.captures(inner_content).map(|cap| cap[1].to_string()).unwrap_or_default();
438            let last_modified = last_modified_regex.captures(inner_content).map(|cap| cap[1].to_string()).unwrap_or_default();
439            let etag = etag_regex.captures(inner_content).map(|cap| cap[1].to_string()).unwrap_or_default();
440            let size = size_regex.captures(inner_content).and_then(|cap| cap[1].parse().ok()).unwrap_or(0);
441            let storage_class = storage_class_regex.captures(inner_content).map(|cap| cap[1].to_string()).unwrap_or_default();
442            let content = ObjectMeta {
443                key,
444                last_modified,
445                etag,
446                size,
447                storage_class,
448            };
449            contents_vec.push(content);
450        }
451
452        contents_vec
453    }
454}
455
456
457#[cfg(test)]
458mod tests {
459    use super::*;
460    use chrono::{Duration, Local};
461    use std::time::{SystemTime, UNIX_EPOCH};
462
463    #[test]
464    fn test_parse_xml() {
465        let xml = r#"<?xml version="1.0" encoding="UTF-8" standalone="yes"?><ListBucketResult xmlns="http://obs.myhwclouds.com/doc/2015-06-30/"><Name>obs-products</Name><Prefix>tmp</Prefix><Marker></Marker><MaxKeys>1000</MaxKeys><IsTruncated>false</IsTruncated><Contents><Key>tmp/</Key><LastModified>2024-12-03T12:01:48.020Z</LastModified><ETag>"d41d8cd98f00b204e9800998ecf8427e"</ETag><Size>0</Size><Owner><ID>74df55bf376f41d48959d2aa9deaaf38</ID></Owner><StorageClass>STANDARD</StorageClass></Contents><Contents><Key>tmp/index001.png</Key><LastModified>2025-08-20T07:42:59.813Z</LastModified><ETag>"de317c0b7b6e02b42ef2b9e29bb5906a"</ETag><Size>12082</Size><Owner><ID>74df55bf376f41d48959d2aa9deaaf38</ID></Owner><StorageClass>STANDARD</StorageClass></Contents><Contents><Key>tmp/index002.png</Key><LastModified>2025-08-20T07:52:10.204Z</LastModified><ETag>"de317c0b7b6e02b42ef2b9e29bb5906a"</ETag><Size>12082</Size><Owner><ID>74df55bf376f41d48959d2aa9deaaf38</ID></Owner><StorageClass>STANDARD</StorageClass></Contents></ListBucketResult>"#;
466        let parser = XmlParser::new(xml);
467        let contents = parser.parse();
468        let json_data = serde_json::to_string_pretty(&contents).unwrap();
469        println!("{}", json_data);
470    }
471
472    #[test]
473    fn test_timestamp() {
474        let now = Local::now();
475        let two_hours = Duration::hours(2);
476        let future_time = now + two_hours;
477
478        let system_time: SystemTime = future_time.into();
479        let duration = system_time.duration_since(UNIX_EPOCH).unwrap();
480        let timestamp = duration.as_secs();
481        println!("timestamp = {}", timestamp);
482    }
483
484}
obs_sdk/lib.rs

obs_sdk/
lib.rs
