本文以错题本算法为例

1. 准备

import time
from requests import request
from urllib.parse import urljoin
filename = '1.jpg' # 图片文件路径
corners = [[0, 0], [2160, 0], [0, 3840], [2160, 3840]]
host = 'http://gateway.algo.leqi.us' # 算法host地址

2. 请求接口

该算法中oss_file必填参数为一图片文件,因此需要先将图片上传至阿里云OSS上.
上传方式为:

1. 调获取文件上传信息接口获得文件的上传地址以及OSS文件名 ```python url = urljoin(host, ‘/api/oss/url’) request_body = { “user_name”:”your_name”, “password”:”your password”, “filename”: “1.jpg” } oss_info = request(“POST”, url=url, json=request_body).json() put_url = oss_info[‘put_url’] oss_name = oss_info[‘oss_name’]

上传文件

request.put(put_url, data=open(filename, ‘rb’).read())

2. 调用[发布算法接口](https://www.yuque.com/fenfendeyouzhiqingnian/algorithm/rc39bm)发布算法
```python
url = urljoin(host, 'api/algorithm')
request_body = {
    "user_name":"your_name",
    "password":"your password",
    "target":"topic",
    "request":{
        "oss_file":    oss_name,
        "corners":corners
    }
}
resp = request("POST", url=url, json=request_body).json()
task_id = resp['task_id']

1. 轮询调用获取任务结果接口获得任务处理结果

   url = urljoin(host, 'api/algorithm/task/{}'.format(task_id))
   while True:
    resp = request('GET', url=url).json()
    if resp['gateway_code']==1001:
        print('任务处理异常 ', resp['error'])
        exit()
    elif resp['gateway_code']==1002:
        # 任务还在处理中
        time.sleep(1)
        continue
    else  resp['gateway_code']!=1000:
        print('未知状态码' resp['error'])
        exit()
   
    # 任务处理成功
    result_im_oss_name = resp['result']['result_im_oss_name']
    box = resp['result']['box']
   

2. 拿到任务结果后,可以调用获取文件url接口来获取文件的下载地址 ```python url = urljoin(host, ‘api/oss/url/‘) params = {“filename”:result_im_oss_name} resp = request(“GET”, url, params=params).json()

   文件的下载/预览地址

   preview_url = resp[‘preview_url’]

   可选,下载文件到本地存储

   with open(“result.jpg”, ‘wb’) as f: f.write(request(“GET”, url).content)

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#### 3. 完整代码
```python
import time

from requests import request
from urllib.parse import urljoin

filename = '1.jpg' # 图片文件路径
corners = [[0, 0], [2160, 0], [0, 3840], [2160, 3840]]
host = 'http://gateway.algo.leqi.us' # 算法host地址

url = urljoin(host, '/api/oss/url')
request_body = {
    "user_name":"your_name",
    "password":"your password",
    "filename": "1.jpg"
}
oss_info = request("POST", url=url, json=request_body).json()
put_url = oss_info['put_url']
oss_name = oss_info['oss_name']

# 上传文件
request.put(put_url, data=open(filename, 'rb').read())

url = urljoin(host, 'api/algorithm')
request_body = {
    "user_name":"your_name",
    "password":"your password",
    "target":"topic",
    "request":{
        "oss_file":    oss_name,
        "corners":corners
    }
}
resp = request("POST", url=url, json=request_body).json()
task_id = resp['task_id']

url = urljoin(host, 'api/algorithm/task/{}'.format(task_id))
while True:
    resp = request('GET', url=url).json()
    if resp['gateway_code']==1001:
        print('任务处理异常 ', resp['error'])
        exit()
    elif resp['gateway_code']==1002:
        # 任务还在处理中
        time.sleep(1)
        continue
    else  resp['gateway_code']!=1000:
        print('未知状态码' resp['error'])
        exit()

    # 任务处理成功
    result_im_oss_name = resp['result']['result_im_oss_name']
    box = resp['result']['box']    

url = urljoin(host, 'api/oss/url/')
params = {"filename":result_im_oss_name}
resp = request("GET", url, params=params).json()
# 文件的下载/预览地址
preview_url = resp['preview_url']
# 可选,下载文件到本地存储
with open("result.jpg", 'wb') as f:
    f.write(request("GET", url).content)