# FastAPI RESTful reqparse

***

**1. Parsing Simple Request Query Parameter**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/query")
async def query(request: Request):
    page = request.query_params.get("page", 1)
    return {"page": page}
```

**2. Parsing Multiple Request Query Parameters**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/queries")
async def queries(request: Request):
    page = request.query_params.get("page", 1)
    size = request.query_params.get("size", 10)
    return {"page": page, "size": size}
```

**3. Parsing Request Query Parameter with Default Value**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/query-default")
async def query_default(request: Request):
    page = request.query_params.get("page", default=1)
    return {"page": page}
```

**4. Parsing Request Query Parameter with Type Conversion**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/query-type")
async def query_type(request: Request):
    page = request.query_params.get("page", default=1, type=int)
    return {"page": page}
```

**5. Parsing Request Form Data**

```python
from fastapi import FastAPI, Form
app = FastAPI()

@app.post("/form")
async def form(name: str = Form(...)):
    return {"name": name}
```

**6. Parsing Multi-Value Request Form Data**

```python
from fastapi import FastAPI, Form
app = FastAPI()

@app.post("/form-multi")
async def form_multi(names: list[str] = Form(...)):
    return {"names": names}
```

**7. Parsing Request Body with JSON Validation**

```python
from fastapi import FastAPI, Body
app = FastAPI()

@app.post("/json")
async def json(body: dict = Body(...)):
    return body
```

**8. Parsing Request Body with Pydantic Model**

```python
from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI()

class User(BaseModel):
    name: str

@app.post("/user")
async def user(user: User):
    return user
```

**9. Parsing Request Body with Custom Validation**

```python
from fastapi import FastAPI, Body
app = FastAPI()

@app.post("/custom")
async def custom(body: dict = Body(...)):
    if "name" not in body or not isinstance(body["name"], str):
        raise ValueError("Invalid name")
    return body
```

**10. Parsing Request Header**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/header")
async def header(request: Request):
    authorization = request.headers.get("Authorization")
    return {"authorization": authorization}
```

**11. Parsing Multi-Value Request Header**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/headers")
async def headers(request: Request):
    accept = request.headers.getlist("Accept")
    return {"accept": accept}
```

**12. Parsing Request Cookies**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/cookies")
async def cookies(request: Request):
    access_token = request.cookies.get("access_token")
    return {"access_token": access_token}
```

**13. Parsing Multi-Value Request Cookies**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/cookies-multi")
async def cookies_multi(request: Request):
    cookies = request.cookies.multi()
    return {"cookies": cookies}
```

**14. Parsing File Upload**

```python
from fastapi import FastAPI, File, UploadFile
app = FastAPI()

@app.post("/upload")
async def upload(file: UploadFile = File(...)):
    return {"filename": file.filename, "content": await file.read()}
```

**15. Parsing Multiple File Uploads**

```python
from fastapi import FastAPI, File, UploadFile
app = FastAPI()

@app.post("/uploads")
async def uploads(files: list[UploadFile] = File(...)):
    return [{"filename": file.filename, "content": await file.read()} for file in files]
```

**16. Parsing Form Data and Files**

```python
from fastapi import FastAPI, File, Form, UploadFile
app = FastAPI()

@app.post("/form-files")
async def form_files(name: str = Form(...), files: list[UploadFile] = File(...)):
    return {"name": name, "files": [{"filename": file.filename, "content": await file.read()} for file in files]}
```

**17. Parsing Request Body with Nested JSON**

```python
from fastapi import FastAPI, Body
app = FastAPI()

@app.post("/nested-json")
async def nested_json(body: dict = Body(...)):
    return body
```

**18. Parsing Request Body with Nested Pydantic Model**

```python
from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI()

class User(BaseModel):
    name: str
    address: str

class Payload(BaseModel):
    user: User

@app.post("/nested-model")
async def nested_model(payload: Payload):
    return payload
```

**19. Parsing Request Body with Custom Validation for Nested Model**

```python
from fastapi import FastAPI, Body
from pydantic import BaseModel
app = FastAPI()

class User(BaseModel):
    name: str
    address: str

class Payload(BaseModel):
    user: User
    amount: int

@app.post("/nested-custom")
async def nested_custom(payload: Payload):
    if payload.amount < 0:
        raise ValueError("Amount must be positive")
    return payload
```

**20. Parsing Request Body with Query Parameters**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/body-query")
async def body_query(request: Request, body: dict):
    page = request.query_params.get("page", 1)
    return {"body": body, "page": page}
```

**21. Parsing Request Body with Headers**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/body-header")
async def body_header(request: Request, body: dict):
    authorization = request.headers.get("Authorization")
    return {"body": body, "authorization": authorization}
```

**22. Parsing Request Body with Cookies**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/body-cookie")
async def body_cookie(request: Request, body: dict):
    access_token = request.cookies.get("access_token")
    return {"body": body, "access_token": access_token}
```

**23. Parsing Request Body with Files and Query Parameters**

```python
from fastapi import FastAPI, File, UploadFile, Request
app = FastAPI()

@app.post("/body-file-query")
async def body_file_query(request: Request, file: UploadFile = File(...), body: dict):
    page = request.query_params.get("page", 1)
    return {"body": body, "file": {"filename": file.filename, "content": await file.read()}, "page": page}
```

**24. Parsing Request Body with Files and Headers**

```python
from fastapi import FastAPI, File, UploadFile, Request
app = FastAPI()

@app.post("/body-file-header")
async def body_file_header(request: Request, file: UploadFile = File(...), body: dict):
    authorization = request.headers.get("Authorization")
    return {"body": body, "file": {"filename": file.filename, "content": await file.read()}, "authorization": authorization}
```

**25. Parsing Request Body with Files and Cookies**

```python
from fastapi import FastAPI, File, UploadFile, Request
app = FastAPI()

@app.post("/body-file-cookie")
async def body_file_cookie(request: Request, file: UploadFile = File(...), body: dict):
    access_token = request.cookies.get("access_token")
    return {"body": body, "file": {"filename": file.filename, "content": await file.read()}, "access_token": access_token}
```

**26. Parsing Request Body with Query Parameters, Headers, and Cookies**

```python
from fastapi import FastAPI, Request
app = FastAPI()

@app.get("/body-all")
async def body_all(request: Request, body: dict):
    page = request.query_params.get("page", 1)
    authorization = request.headers.get("Authorization")
    access_token = request.cookies.get("access_token")
    return {"body": body, "page": page, "authorization": authorization, "access_token": access_token}
```

**27. Parsing Request Body with Pydantic Model and Query Parameters**

```python
from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI()

class User(BaseModel):
    name: str

@app.get("/body-model-query")
async def body_model_query(user: User, request: Request):
    page = request.query_params.get("page", 1)
    return {"user": user, "page": page}
```

**28. Parsing Request Body with Pydantic Model and Headers**

```python
from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI()

class User(BaseModel):
    name: str

@app.get("/body-model-header")
async def body_model_header(user: User, request: Request):
    authorization = request.headers.get("Authorization")
    return {"user": user, "authorization": authorization}
```

**29. Parsing Request Body with Pydantic Model and Cookies**

```python
from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI()

class User(BaseModel):
    name: str

@app.get("/body-model-cookie")
async def body_model_cookie(user: User, request: Request):
    access_token = request.cookies.get("access_

```