使用 Nutrient DWS API 处理、转换、OCR、提取、脱敏、签名和填充文档。支持 PDF、DOCX、XLSX、PPTX、HTML 和图像。
Scanned 9/8/2026
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---
name: nutrient-document-processing
description: 使用 Nutrient DWS API 处理、转换、OCR、提取、脱敏、签名和填充文档。支持 PDF、DOCX、XLSX、PPTX、HTML 和图像。
origin: ECC
---
# Nutrient 文档处理(Nutrient Document Processing)
使用 [Nutrient DWS Processor API](https://www.nutrient.io/api/) 处理文档。转换格式、提取文本和表格、对扫描文档进行 OCR 光学字符识别、脱敏个人身份信息(PII)、添加水印、进行数字签名以及填充 PDF 表单。
## 设置(Setup)
在 **[nutrient.io](https://dashboard.nutrient.io/sign_up/?product=processor)** 获取免费 API 密钥。
```bash
export NUTRIENT_API_KEY="pdf_live_..."
```
所有请求均以 multipart POST 形式发送至 `https://api.nutrient.io/build`,并包含一个 `instructions` JSON 字段。
## 操作(Operations)
### 转换文档(Convert Documents)
```bash
# DOCX 转 PDF
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.docx=@document.docx" \
-F 'instructions={"parts":[{"file":"document.docx"}]}' \
-o output.pdf
# PDF 转 DOCX
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"output":{"type":"docx"}}' \
-o output.docx
# HTML 转 PDF
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "index.html=@index.html" \
-F 'instructions={"parts":[{"html":"index.html"}]}' \
-o output.pdf
```
支持的输入格式:PDF, DOCX, XLSX, PPTX, DOC, XLS, PPT, PPS, PPSX, ODT, RTF, HTML, JPG, PNG, TIFF, HEIC, GIF, WebP, SVG, TGA, EPS。
### 提取文本和数据(Extract Text and Data)
```bash
# 提取纯文本
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"output":{"type":"text"}}' \
-o output.txt
# 将表格提取为 Excel
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"output":{"type":"xlsx"}}' \
-o tables.xlsx
```
### OCR 扫描文档(OCR Scanned Documents)
```bash
# OCR 转为可搜索的 PDF(支持 100 多种语言)
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "scanned.pdf=@scanned.pdf" \
-F 'instructions={"parts":[{"file":"scanned.pdf"}],"actions":[{"type":"ocr","language":"english"}]}' \
-o searchable.pdf
```
语言:支持 100 多种语言,通过 ISO 639-2 代码指定(例如 `eng`, `deu`, `fra`, `spa`, `jpn`, `kor`, `chi_sim`, `chi_tra`, `ara`, `hin`, `rus`)。也可以使用完整的语言名称,如 `english` 或 `german`。请参阅[完整的 OCR 语言对照表](https://www.nutrient.io/guides/document-engine/ocr/language-support/)以获取所有支持的代码。
### 脱敏敏感信息(Redact Sensitive Information)
```bash
# 基于模式(SSN, 电子邮件)
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"actions":[{"type":"redaction","strategy":"preset","strategyOptions":{"preset":"social-security-number"}},{"type":"redaction","strategy":"preset","strategyOptions":{"preset":"email-address"}}]}' \
-o redacted.pdf
# 基于正则表达式
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"actions":[{"type":"redaction","strategy":"regex","strategyOptions":{"regex":"\\b[A-Z]{2}\\d{6}\\b"}}]}' \
-o redacted.pdf
```
预设(Presets):`social-security-number`, `email-address`, `credit-card-number`, `international-phone-number`, `north-american-phone-number`, `date`, `time`, `url`, `ipv4`, `ipv6`, `mac-address`, `us-zip-code`, `vin`。
### 添加水印(Add Watermarks)
```bash
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"actions":[{"type":"watermark","text":"CONFIDENTIAL","fontSize":72,"opacity":0.3,"rotation":-45}]}' \
-o watermarked.pdf
```
### 数字签名(Digital Signatures)
```bash
# 自签名 CMS 签名
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "document.pdf=@document.pdf" \
-F 'instructions={"parts":[{"file":"document.pdf"}],"actions":[{"type":"sign","signatureType":"cms"}]}' \
-o signed.pdf
```
### 填充 PDF 表单(Fill PDF Forms)
```bash
curl -X POST https://api.nutrient.io/build \
-H "Authorization: Bearer $NUTRIENT_API_KEY" \
-F "form.pdf=@form.pdf" \
-F 'instructions={"parts":[{"file":"form.pdf"}],"actions":[{"type":"fillForm","formFields":{"name":"Jane Smith","email":"jane@example.com","date":"2026-02-06"}}]}' \
-o filled.pdf
```
## MCP 服务器(替代方案)
对于原生工具集成,可以使用 MCP 服务器代替 curl:
```json
{
"mcpServers": {
"nutrient-dws": {
"command": "npx",
"args": ["-y", "@nutrient-sdk/dws-mcp-server"],
"env": {
"NUTRIENT_DWS_API_KEY": "YOUR_API_KEY",
"SANDBOX_PATH": "/path/to/working/directory"
}
}
}
}
```
## 何时使用
- 在不同格式之间转换文档(PDF, DOCX, XLSX, PPTX, HTML, 图像)
- 从 PDF 中提取文本、表格或键值对
- 对扫描文档或图像进行 OCR
- 在共享文档前脱敏个人身份信息(PII)
- 为草案或机密文档添加水印
- 为合同或协议进行数字签名
- 以编程方式填充 PDF 表单
## 链接(Links)
- [API 游乐场 (API Playground)](https://dashboard.nutrient.io/processor-api/playground/)
- [完整 API 文档](https://www.nutrient.io/guides/dws-processor/)
- [npm MCP 服务器](https://www.npmjs.com/package/@nutrient-sdk/dws-mcp-server)
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