Python Flask 开发 - Flask 路径参数类型（string、int、float、path、uuid）

查看路径参数类型

forconverter_name,converter_classinapp.url_map.converters.items():print(f"{converter_name}:{converter_class}")

# 输出结果 default: <class 'werkzeug.routing.converters.UnicodeConverter'> string: <class 'werkzeug.routing.converters.UnicodeConverter'> any: <class 'werkzeug.routing.converters.AnyConverter'> path: <class 'werkzeug.routing.converters.PathConverter'> int: <class 'werkzeug.routing.converters.IntegerConverter'> float: <class 'werkzeug.routing.converters.FloatConverter'> uuid: <class 'werkzeug.routing.converters.UUIDConverter'>

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一、string

@app.route('/user/<string:username>')defshow_string(username):returnf'type: string, value:{username}, python_type:{type(username).__name__}'

1. 测试/user/john_doe

# 输出结果 type: string, value: john_doe, python_type: str

2. 测试/user/123

# 输出结果 type: string, value: 123, python_type: str

3. 测试/user/john%20doe

# 输出结果 type: string, value: john doe, python_type: str

---

二、int

@app.route('/article/<int:article_id>')defshow_int(article_id):returnf'type: int, value:{article_id}, python_type:{type(article_id).__name__}'

1. 测试/article/42

# 输出结果 type: int, value: 42, python_type: int

2. 测试/article/0

# 输出结果 type: int, value: 0, python_type: int

3. 测试/article/-100

# 输出结果 Not Found

4. 测试/article/3.14

# 输出结果 Not Found

5. 测试/article/abc

# 输出结果 Not Found

6. 测试/article/10abc

# 输出结果 Not Found

---

三、float

@app.route('/price/<float:price>')defshow_float(price):returnf'type: float, value:{price}, python_type:{type(price).__name__}'

1. 测试/price/19.99

# 输出结果 type: float, value: 19.99, python_type: float

2. 测试/price/-5.5

# 输出结果 Not Found

3. 测试/price/100

# 输出结果 Not Found

4. 测试/price/100.0

# 输出结果 type: float, value: 100.0, python_type: float

5. 测试/price/.5

# 输出结果 Not Found

6. 测试/price/3.1415926

# 输出结果 type: float, value: 3.1415926, python_type: float

7. 测试/price/10,5

# 输出结果 Not Found

8. 测试/price/10k

# 输出结果 Not Found

9. 测试/price/abc

# 输出结果 Not Found

---

四、path

1、演示

@app.route('/path/<path:filepath>')defshow_path(filepath):returnf'type: path, value:{filepath}, python_type:{type(filepath).__name__}'

1. 测试/path/docs

# 输出结果 type: path, value: docs, python_type: str

2. 测试/path/docs/api

# 输出结果 type: path, value: docs/api, python_type: str

3. 测试/path/docs/api/v1

# 输出结果 type: path, value: docs/api/v1, python_type: str

4. 测试/path/static/css/style.css

# 输出结果 type: path, value: static/css/style.css, python_type: str

5. 测试/path/a/b/../d

# 输出结果 type: path, value: a/b/../d, python_type: str

2、string 处理路径类型的问题

@app.route('/path/<string:filepath>')defshow_path(filepath):returnf'type: string, value:{filepath}, python_type:{type(filepath).__name__}'

1. 测试/path/docs

# 输出结果 type: string, value: docs, python_type: str

2. 测试/path/docs/api

# 输出结果 Not Found

3. 测试/path/docs/api/v1

# 输出结果 Not Found

4. 测试/path/static/css/style.css

# 输出结果 Not Found

5. 测试/path/a/b/../d

# 输出结果 Not Found

---

五、uuid

@app.route('/resource/<uuid:resource_id>')defshow_uuid(resource_id):returnf'type: uuid, value:{resource_id}, python_type:{type(resource_id).__name__}'

1. 测试/resource/123e4567-e89b-12d3-a456-426614174000

# 输出结果 type: uuid, value: 123e4567-e89b-12d3-a456-426614174000, python_type: UUID

2. 测试/resource/550e8400-e29b-41d4-a716-446655440000

# 输出结果 type: uuid, value: 550e8400-e29b-41d4-a716-446655440000, python_type: UUID

3. 测试/resource/not-a-uuid

# 输出结果 Not Found

4. 测试/resource/123

# 输出结果 Not Found

5. 测试/resource/123e4567-e89b-12d3-a456-42661417400（短了）

# 输出结果 Not Found

6. 测试/resource/123e4567-e89b-12d3-a456-4266141740000（长了）

# 输出结果 Not Found