6.1K+
- 使用任意语言构建请求
- 使用调度器和 webhook 自动化
- 支持 JSON、NDJSON 或 CSV 交付
可用的电子商务爬虫工具
选择一个电子商务爬虫工具并调用它。每个 电商 爬虫工具都会列出其输出字段、交付量和实时成功率。
定价
网页爬虫工具 API 定价
只为成功交付的内容付费。无隐藏费用，交付失败不收费。
- 只为成功结果付费，无隐藏费用
- 每月 5,000 个免费 credits，免费开始
- 无需预先承诺，可随时取消
- 7*24 小时专家支持和企业级功能
我们接受这些支付方式:
只需要电子商务数据？无需自行抓取。
购买电子商务数据集
工作原理
只需 3 步，即可从零开始获取 电商 数据
无需配置代理，也无需管理基础设施。选择、调用并接收数据。
-
选择爬虫工具
从上方的 [current_scraper_name} 爬虫工具中进行选择，或使用 AI 在几分钟内创建自己的爬虫工具。
-
调用 API
一次 API 调用最多可处理 5,000 个目标 URL。支持 Python 和 Node.js SDK、CLI、MCP 服务器或任何 HTTP 客户端。
-
获取结构化数据
以 JSON、NDJSON 或 CSV 格式接收干净、解析完毕的 [current_scrper_name] 数据。可通过 API、Webhook 或云存储交付。
Scraper API Call
curl -H "Authorization: Bearer API_TOKEN" -H "Content-Type: application/json" -d '[{"url":"https://www.amazon.com/Quencher-FlowState-Stainless-Insulated-Smoothie/dp/B0CRMZHDG8","asin":"B0CRMZHDG8","origin_url":"https://www.amazon.com/Quencher-FlowState-Stainless-Insulated-Smoothie/dp/B0CRMZHDG8","zipcode":"94107","language":""},{"url":"https://www.amazon.com/KitchenAid-Protective-Dishwasher-Stainless-8-72-Inch/dp/B07PZF3QS3","asin":"B07PZF3QS3","zipcode":"","language":""},{"url":"https://www.amazon.com/TruSkin-Naturals-Vitamin-Topical-Hyaluronic/dp/B01M4MCUAF","asin":"","origin_url":"https://www.amazon.com/TruSkin-Naturals-Vitamin-Topical-Hyaluronic/dp/B01M4MCUAF","zipcode":"94124","language":""}]' "https://api.brightdata.com/datasets/v3/trigger?dataset_id=gd_l7q7dkf244hwjntr0&format=json&uncompressed_webhook=true"
Response payload
[
{
"timestamp": "2026-11-05",
"title": "Exterior Chrome Door Handle Front Driver Left Side with Keyhole Replacement for Kia Forte, Koup, Forte5 2009 2013",
"seller_name": "LIG***ORE***",
"brand": "Otois",
"description": "Brand: Otois Motor Parts Manufacture Part Number: 82651-1M020 x1 Door Handle Grip 82652-1M020 x1 Keyhole Finish Cover Di...",
"initial_price": 18.98,
"currency": "USD",
"availability": "Only 5 left in stock - order soon."
},
{
"timestamp": "2026-11-05",
"title": "Premium 5-Pack Organic Cotton Burp Cloths for Newborns \u0026 Infants",
"seller_name": "Kid***tar***",
"brand": "KiddyStar",
"description": "Watch Video To Know More Multi Purpose Must Have for Every Stage More than just burp cloths, these versatile essentials ...",
"initial_price": 25.99,
"currency": "USD",
"availability": "In Stock"
},
{
"timestamp": "2026-11-05",
"title": "Boys Swimsuits UPF 50+ Sun Protection Rash Guard 2 Piece Kids Bathing Suit 4-16 Years",
"seller_name": "BAS***NA",
"brand": "BASADINA",
"description": "Features: 2 piece girls swimsuit set, consists of short sleeve rash guard shirt and elastic waist swimming pants . Rash ...",
"initial_price": 23.69,
"currency": "USD",
"availability": "In Stock"
},
{
"timestamp": "2026-11-05",
"title": "Bottle Brush Cleaner with Nipple Brush, Red 2 Pack Flexible Baby Bottle Brush Scrubber with Rubber Grip Handle, Sturdy B...",
"seller_name": "Ama***.co***",
"brand": "Superio",
"description": "B00CIBMZT8",
"initial_price": 10.99,
"currency": "USD",
"availability": "Only 1 left in stock - order soon."
},
{
"timestamp": "2026-11-05",
"title": "Women Plus Size 2 Piece Outfits Short Sleeve Top and Legging Pant Set Lounge Sets Tracksuit",
"seller_name": "******",
"brand": "YeGine",
"description": "YeGine Create different styles Plus Size 2 Piece Outfits Add to Cart Plus Size 2 Piece Outfits Add to Cart Plus Size Max...",
"initial_price": 19.99,
"currency": "USD",
"availability": "In Stock"
}
]
Scraper API Call
curl -H "Authorization: Bearer API_TOKEN" -H "Content-Type: application/json" -d '[{"url":"https://www.walmart.com/ip/Hershey-s-Kit-Kat-And-Reese-s-Assorted-Flavored-Candy-Party-Pack-33-38-oz/466623588?athbdg=L1600\u0026adsRedirect=true","zipcode":""},{"url":"https://www.walmart.com/ip/Starburst-Pink-Yellow-Mix-Chewy-Fruit-Candy-3-lbs-Original-Strawberry-Lemon-Soft-Chew-Candies-Bulk-Family-Size-Assortment-Pack-Individually-Wrapped-4/1016450755?adsRedirect=true","zipcode":""}]' "https://api.brightdata.com/datasets/v3/trigger?dataset_id=gd_l95fol7l1ru6rlo116&format=json&uncompressed_webhook=true"
Response payload
[
{
"timestamp": "2026-11-05",
"url": "https:\/\/www.walmart.com\/ip\/Flash-Furniture-36-Square-Walnut-Laminate-Table-Set-with-X-Base-and-4-Ladder-Back-Metal-Chair...",
"final_price": 514.94,
"sku": "41356827",
"currency": "USD",
"gtin": "847254047494",
"specifications": [
{
"name": "Seating capacity",
"value": "4"
},
{
"name": "Table shape",
"value": "Square"
},
{
"name": "Items included",
"value": "Dining Furniture"
},
{
"name": "Dining furniture set type",
"value": "Dining Table with Chair"
},
{
"name": "Material",
"value": "Laminate, Engineered Wood: Medium Density Fiberboard, Steel, PVC, Foam, Vinyl, Plywood"
},
{
"name": "Color",
"value": "Brown"
},
{
"name": "Piece count",
"value": "5"
},
{
"name": "Brand",
"value": "Flash Furniture"
}
],
"image_urls": [
"https:\/\/i5.walmartimages.com\/seo\/Flash-Furniture-36-Square-Walnut-Laminate-Table-Set-with-X-Base-and-4-Ladder-Back-Metal...",
"https:\/\/i5.walmartimages.com\/asr\/89a53ee1-8871-4c14-b453-b0b493a3378a.3a953261c509308e67207b8734d040d2.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/b4b500f2-e2f1-4405-8340-5bb86da84735.bb7c8f537289ee27e61ccf04f237cb42.jpeg"
]
},
{
"timestamp": "2026-11-05",
"url": "https:\/\/www.walmart.com\/ip\/Youtooz-Vtuber-Collection-Ironmouse-Vinyl-Figure-7\/17246511454",
"final_price": 44.92,
"sku": "17246511454",
"currency": "USD",
"gtin": "810122549611",
"specifications": [
{
"name": "Character",
"value": "Ironmouse"
},
{
"name": "Brand",
"value": "Youtooz"
},
{
"name": "Theme",
"value": "Vtuber"
},
{
"name": "Character group",
"value": "Vshojo"
},
{
"name": "Height",
"value": "6 in"
},
{
"name": "Color",
"value": "Multicolor"
},
{
"name": "Material",
"value": "Vinyl Plastic"
},
{
"name": "Features",
"value": "Collectible"
}
],
"image_urls": [
"https:\/\/i5.walmartimages.com\/seo\/Youtooz-Vtuber-Collection-Ironmouse-Vinyl-Figure-7_9b5b9afc-6093-4114-bc2a-805b39a0b426...",
"https:\/\/i5.walmartimages.com\/asr\/a40230e2-beae-46f3-b4f5-3ab967a8cab1.ed4d6e7e1397933e1929fdaabb986781.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/d2f1272c-072a-4fcb-ae75-feaa8c3ecb4f.42eed123fabe51bae23d844cf2e54d8b.jpeg"
]
},
{
"timestamp": "2026-11-05",
"url": "https:\/\/www.walmart.com\/ip\/Lindt-EXCELLENCE-78-Cocoa-Dark-Chocolate-Bar-Easter-Chocolate-Candy-3-5-oz\/160018012",
"final_price": 2.68,
"sku": "160018012",
"currency": "USD",
"gtin": "009542031695",
"specifications": [
{
"name": "Brand",
"value": "Lindt"
},
{
"name": "Chocolate type",
"value": "Dark Chocolates"
},
{
"name": "Flavor",
"value": "Dark Chocolate"
},
{
"name": "Size descriptor",
"value": "Regular"
},
{
"name": "Texture",
"value": "Smooth"
},
{
"name": "Product net content parent",
"value": "3.5 Ounces"
},
{
"name": "Net content statement",
"value": "3.5 OZ (100g)"
},
{
"name": "Size",
"value": "3.5 oz"
}
],
"image_urls": [
"https:\/\/i5.walmartimages.com\/seo\/Lindt-EXCELLENCE-78-Cocoa-Dark-Chocolate-Bar-Easter-Chocolate-Candy-3-5-oz_c60898f5-5ac...",
"https:\/\/i5.walmartimages.com\/asr\/34e5b7c3-1349-4355-9f16-e47d70e45609.2229f0ad9325720476a2e3b762a2c53a.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/c4ac14f3-5e0f-4925-992a-670808a3c1c8.6ccea2f744ff19ae54511ca972e48b65.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/94035d15-c71a-460a-b2f4-29ae182db618.2d6cbcfb8275060f411b0f0b7de94d4d.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/6eb0295b-12c3-4119-8e34-ea2c81ce060c.219500b48476c1e06848da82cce5c52b.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/8e6a8162-682b-4677-afed-4930d1761929.c31cbd2f8635e9d9620e9da25f8abbfd.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/d83fa4c3-0342-4c6b-afcb-7a9c0fbc1784.4eef23024e0b73e55a84be046963d1e3.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/420113d6-8bd6-44ab-b19e-8271474ffc67.31ffd6af99f9d1b79de246c89c3b8ac2.jpeg"
]
},
{
"timestamp": "2026-11-05",
"url": "https:\/\/www.walmart.com\/ip\/U-S-Polo-Assn-Men-s-Sleeve-Striped-Thermal-Crew-Tee\/456814198",
"final_price": 21.57,
"sku": "456814198",
"currency": "USD",
"gtin": "786665509507",
"specifications": [
{
"name": "Color",
"value": "Blue"
},
{
"name": "Clothing size",
"value": "S"
},
{
"name": "Gender",
"value": "Male"
},
{
"name": "Brand",
"value": "U.S. Polo Assn."
},
{
"name": "Clothing fit",
"value": "Relaxed Fit"
},
{
"name": "Clothing neck style",
"value": "Casual"
},
{
"name": "Sleeve length style",
"value": "Long Sleeve"
},
{
"name": "Pattern",
"value": "Solid Print"
}
],
"image_urls": [
"https:\/\/i5.walmartimages.com\/seo\/U-S-Polo-Assn-Men-s-Sleeve-Striped-Thermal-Crew-Tee_393aba45-8cd7-4414-9c3b-61dba56f707...",
"https:\/\/i5.walmartimages.com\/asr\/8ad4a771-af81-4b01-908e-47c17b8b5bf5.9587ad5e2518a9ddd2679e732aa09c4e.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/1323b96d-b895-4d4d-8077-02bdd733ec8d.f39d7cdfdb298f211b564d198bc7a086.jpeg"
]
},
{
"timestamp": "2026-11-05",
"url": "https:\/\/www.walmart.com\/ip\/Safe-Box-Cold-Rolled-Steel-Anti-Theft-Safe-Digital-Keypad-Fireproof-Waterproof-Document-Bag-R...",
"final_price": 188.99,
"sku": "19923973715",
"currency": "USD",
"gtin": "827258397283",
"specifications": [
{
"name": "Safe type",
"value": "Standalone Safes"
},
{
"name": "Lock type",
"value": "Key Lock"
},
{
"name": "Is fire-resistant",
"value": "Y"
},
{
"name": "Resists water",
"value": "Y"
},
{
"name": "Brand",
"value": "OUTGOODS"
},
{
"name": "Items included",
"value": "Digital Keypad, Fireproof Waterproof Document Bag, Removable Shelf, Lockable Safe"
},
{
"name": "Has written warranty",
"value": "No"
}
],
"image_urls": [
"https:\/\/i5.walmartimages.com\/seo\/Safe-Box-Cold-Rolled-Steel-Anti-Theft-Safe-Digital-Keypad-Fireproof-Waterproof-Document...",
"https:\/\/i5.walmartimages.com\/asr\/a99cf4a6-267e-4055-90c8-17817d413ffc.b552d6b6a51fccb2fdfa92ce1726b9b2.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/1682f749-a366-47b4-9eac-4d17b484b166.0796939ee1fed1f5b9e0c961caff6e76.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/5c71ecf1-24bf-462d-a4d6-dba1159e88d4.eb3557c0cfa2d5c5ea1401a0eeccdafb.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/8ff1f6a9-7780-45f2-9018-37f8ce2c5b59.b2d12a519b89aaab8143f40a70da1d4d.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/ae4b7b38-95ef-4aa1-9419-fb4fdd87a650.1af6f7f8e54718d1f25984717dd25da8.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/91c0d23e-5303-4ee4-ae13-83f8ec5e63ba.7dc9377b0067bd1289f9165e2da29ba6.jpeg",
"https:\/\/i5.walmartimages.com\/asr\/bf917efc-8936-4cbf-8dbf-8389f950620b.e40277bbda66669bab47b8fb347aef20.jpeg"
]
}
]
Scraper API Call
curl -H "Authorization: Bearer API_TOKEN" -H "Content-Type: application/json" -d '[{"url":"https://www.target.com/p/petal-and-pup-skarlett-top/-/A-1002219928","zipcode":"01011"},{"url":"https://www.target.com/p/petal-and-pup-skarlett-top/-/A-1002219928","zipcode":""},{"url":"https://www.target.com/p/women-s-long-sleeve-shrunken-rib-t-shirt-universal-thread/-/A-88552173?preselect=88471695#lnk=sametab","zipcode":""}]' "https://api.brightdata.com/datasets/v3/trigger?dataset_id=gd_ltppk5mx2lp0v1k0vo&format=json&uncompressed_webhook=true"
Response payload
[
{
"timestamp": "2026-11-02",
"url": "https:\/\/www.target.com\/p\/prominence-home-billet-3-light-semi-flush-convertible-pendant-light-matte-black\/-\/A-1009156615",
"product_id": "1009156615",
"title": "Prominence Home Billet 3 Light Semi Flush Convertible Pendant Light, Matte Black",
"product_description": "Enhance your home with versatile style and timeless appeal using the Prominence Home Billet 3-Light Semi Flush Convertib...",
"rating": 0,
"reviews_count": 0,
"initial_price": 69.99
},
{
"timestamp": "2026-11-02",
"url": "https:\/\/www.target.com\/p\/trc-recreation-lazy-bunz-foam-water-saddle-pool-float-for-adults-and-kids-lounger-for-swimming-...",
"product_id": "82219581",
"title": "TRC Recreation Lazy Bunz Foam Saddle Swimming Pool Lounger Float, Navy Blue",
"product_description": "Ride the waves in style with the TRC Recreation Lazy Bunz Saddle Seat. You won\u0027t want to forget this pool floater on you...",
"rating": 4.67,
"reviews_count": 30,
"initial_price": 159.99
},
{
"timestamp": "2026-11-02",
"url": "https:\/\/www.target.com\/p\/home-heritage-1-1-75-artificial-christmas-tree-base-rotating-metal-stand-with-snowdrift-6-5-ft-...",
"product_id": "1000998116",
"title": "Home Heritage Rotating Tree Stand Base w\/ Snowdrift 6.5 Ft Pre-Lit Holiday Tree",
"product_description": "Create an unforgettable holiday display with the Home Heritage Rotating Tree Stand Base and Snowdrift Quick Set Pre-Lit ...",
"rating": 0,
"reviews_count": 0,
"initial_price": 321.98
},
{
"timestamp": "2026-11-02",
"url": "https:\/\/www.target.com\/p\/farm-innovators-1-quart-25-watt-powered-heated-electric-water-bowl-with-thermostatic-control-an...",
"product_id": "84115613",
"title": "Farm Innovators 1 Quart 25 Watt Powered Heated Electric Water Bowl with Thermostatic Control and Anti Chew Cord Protecto...",
"product_description": "Keep your outdoor pets happy this winter with the Farm Innovators 1-Quart Electric Heated Pet Water Bowl. This heated pe...",
"rating": 5,
"reviews_count": 3,
"initial_price": 65.99
},
{
"timestamp": "2026-11-02",
"url": "https:\/\/www.target.com\/p\/good-ideas-rain-wizard-50-gallon-rain-saver-barrel-water-storage-urn-with-planter-space-and-2-b...",
"product_id": "90888553",
"title": "Good Ideas Rain Wizard 50 Gallon Plastic Rain Barrel Urn, Sandstone (2 Pack)",
"product_description": "When drought sets in and rain is in short supply, rain barrels can provide that precious water you need for your lawn an...",
"rating": 0,
"reviews_count": 0,
"initial_price": 919.99
}
]
Amazon 采集器
告诉你的智能体：
Read https://brightdata.com/SKILL.md and get structured JSON for this Amazon product via the amazon_product pipeline: https://www.amazon.com/Quencher-FlowState-Stainless-Insulated-Smoothie/dp/B0CRMZHDG8或者自己运行：
npx -p @brightdata/cli bdata loginbdata pipelines amazon_product "https://www.amazon.com/Quencher-FlowState-Stainless-Insulated-Smoothie/dp/B0CRMZHDG8"或者通过 MCP 连接：
https://mcp.brightdata.com/mcp?token=YOUR_API_KEY
面向编程智能体
将电子商务爬虫工具接入您的智能体
您的智能体可从我们持续维护的电子商务爬虫工具中进行选择。您可以随时让它运行，每次运行都会将实时网页数据直接交付至您的存储空间。适用于 Claude Code、Codex、Cursor 及任何其他编程智能体。
- 使用 npx 即可运行，无需安装
- bdata login 会打开浏览器进行身份验证，无需粘贴密钥
- 指定一个爬虫工具，即可获得 JSON 数据
- 支持交付至 AWS · GCP · Azure · Snowflake · Webhook
所需的一切，均已内置
你只为结果付费。代理、渲染、并发和交付始终包含在每个方案中。
直达数据源
每个请求都运行在 Bright Data 基础设施上。400M+ IP、解锁和浏览器均已内置。
即时扩展到数百万页面
发送无限并发请求 - 无需管理基础设施，无需更改配置。
网站变化时爬虫工具会自动修复
AI 驱动的自修复能力可检测网站变化并修复爬虫工具。你的管道持续运行。
数千个已验证爬虫工具
每个爬虫工具均由 Bright Data 构建、测试和维护。无需依赖社区猜测。
按结果付费，无额外费用
每条记录一个价格。代理、重试、渲染、解锁 - 全部包含，无隐藏费用。
合规且提供全面支持
符合 GDPR 和 CCPA。每个方案均提供 7*24 小时人工支持，包括免费方案。
几分钟内开始采集 电商 数据
从代码调用 API、通过控制面板点击运行，或交给你的 AI 智能体。
简化电子商务数据提取
应用场景
电子商务数据抓取应用场景
为您的企业提供实时电子商务洞察。
商品与定价优化
商品
价格
ASIN
市场分析
畅销商品
卖家
排名
品牌监测
评论
评分
情感倾向
最低广告价格与卖家监测
商品目录
变体
品类
将 Bright Data 与其他提供商进行比较
网页爬虫工具 API 与其他提供商对比
功能
Bright Data
其他爬虫服务商
自动扩缩容基础设施
无限制
部分支持
绕过反爬虫机制和验证码
内置
部分支持
住宅代理网络
超过 4 亿个 IP
有限的 IP 池
预构建爬虫工具
超过 1,400 个
50–200 个
自动维护（适应网站变化）
全天候
取决于开发者
定价模式
按记录收取统一价格，包含所有费用
计算资源、代理和存储分别计费
失败的请求
失败不收费，仅成功时付费
通常仍会收费
自定义网站（无预构建爬虫工具）
AI 几分钟内即可完成构建，内置自动修复功能
社区构建的爬虫工具，无服务级别协议（SLA）
合规性（GDPR、CCPA、SOC 2）
完全合规
部分支持
结构化输出（JSON/CSV）
自动生成
支持服务
全天候专家支持，免费套餐也可享有
社区论坛
免费套餐
每月 5,000 条记录
视情况而定
引领合规网页数据采集实践
仅采集公开可用数据。通过 ISO 27001 认证，实施 SOC 2 控制，并符合 GDPR 和 CCPA。每个使用场景均由专属合规与伦理团队审核，并由有文档记录的 Know Your Customer 流程和可接受使用政策提供支持。
电商 爬虫 API 常见问题
什么是 电商 爬虫 API？
电商 爬虫 API 是一款强大工具，专为自动从 电商 网站提取数据而设计，使用户能够高效采集和处理大量数据，用于各种使用场景。
电商 爬虫 API 如何工作？
电商 爬虫 API 通过向目标网站发送自动化请求、提取所需数据点并以结构化格式交付数据来工作。该流程可确保数据采集准确且快速。
电商 爬虫 API 是否符合数据保护法规？
是的，电商 爬虫 API 旨在符合数据保护法规，包括 GDPR 和 CCPA。它可确保所有数据采集活动均以符合伦理且合法的方式执行。
我可以使用 电商 爬虫 API 进行竞争分析吗？
当然可以！电商 爬虫 API 非常适合竞争分析，让你能够收集有关竞争对手活动、趋势和策略的洞察。
如何将 电商 爬虫 API 与现有系统集成？
电商 爬虫 API 可与各种平台和工具无缝集成。你可以将其用于现有数据管道、CRM 系统或分析工具，以提升数据处理能力。
电商 爬虫 API 是否提供免费层级？
是的！每个新的 Bright Data 账户每月都会自动获得 5,000 个免费 credits（价值约 7.50 美元）——无需信用卡、无需促销码，也无需承诺。这些 credits 适用于 Scrapers（包括 电商 爬虫 API），以及网络解锁器 API 和搜索引擎 API。Credits 会在每月 1 日续期，注册后即可立即开始进行 API 调用。
使用 电商 爬虫 API 时，如果免费 credits 用完会怎样？
每月 5,000 个免费 credits 用完后，具体情况取决于你的账户余额。如果你已预存资金，服务将按标准 PAYG 费率无缝继续，不会中断。如果没有预存资金，请求将返回错误，直到你充值或 credits 在次月 1 日续期。请注意，未使用的免费 credits 不会结转。
为避免服务中断，你可以在 brightdata.com/cp/billing/settings 的账单设置中启用自动充值。
电商 爬虫 API 有哪些使用限制？
电商 爬虫 API 没有特定使用限制，可让你根据需要灵活扩展。
你们是否为 电商 爬虫 API 提供支持？
是的，我们为 电商 爬虫 API 提供专属支持。我们的支持团队全天候 24/7 为你提供帮助，解答你在使用 API 时可能遇到的任何问题。
有哪些交付方式可用？
Amazon S3、Google Cloud Storage、Google PubSub、Microsoft Azure Storage、Snowflake 和 SFTP。
有哪些文件格式可用？
JSON、NDJSON、JSON lines、CSV 和 .gz 文件（压缩）。