am",
"message": "your name is " <> params["name"] <> " and age is " <> to_string(params["age"]),
}
else
json conn, %{
"result": "success from json_param",
"message": "your name is " <> params["name"],
}
end
end
post "/json-param", ApiParamController, :json_param
- 启动 phoenix 开发服务器,就可以在浏览器中访问对应的 URL
测试api 可以使用 curl 命令:
curl -X POST -H "Content-Type: application/json" -H "Cache-Control: no-cache" -d '{
"name": "wyb"
}' "http://localhost:4000/api/json-param"
curl -X POST -H "Content-Type: application/json" -H "Cache-Control: no-cache" -d '{
"name": "wyb",
"age": 33
}' "http://localhost:4000/api/json-param"
下载 文件
introduce by code: api的参数的上面的示例一样
- controller 中相关代码:(api_param_controller.ex)
@doc "/api/file-param"
def file_param(conn, params) do
filepath = "/tmp/downloadfile.txt"
if Map.has_key?(params, "age") do
File.write(filepath, "your name is " <> params["name"] <> " and age is " <> to_string(params["age"]))
else
File.write(filepath, "your name is " <> params["name"])
end
conn |> send_file(200, filepath)
end
get "/file-param", ApiParamController, :file_param
- 启动 phoenix 开发服务器,就可以在浏览器中访问对应的 URL
在 浏览器 中访问 http://localhost:4000/api/file-param?name=wang&age=33 和 http://localhost:4000/api/file-param?name=wang 可以看到返回的 json。
上传 文件
introduce by code: api的参数的上面的示例一样
- controller 中相关代码:(api_param_controller.ex)
@doc "/api/file-param"
def upload_param(conn, params) do
file = params["file"]
File.cp(file.path, "/tmp/upload.file")
json conn, %{
"result": "success from file_param",
"message": "your name is " <> params["name"] <> " and age is " <> to_string(params["age"])
<> " and the filename which you upload is " <> file.filename,
}
end
post "/file-param", ApiParamController, :upload_param
- 启动 phoenix 开发服务器,就可以在浏览器中访问对应的 URL
测试api 可以使用 curl 命令: 命令中的 file 要替换成你的实际文件路径
curl -X POST -H "Cache-Control: no-cache" -H "Content-Type: multipart/form-data" \
-F "name=wyb" -F "age=33" -F "file=@/tmp/test.jpg" "http://localhost:4000/api/file-param"
总结
可以看岀,phoenix framework 的 Plug 提供了丰富的功能,所以编写 api 非常方便。 掌握了上面的示例,基本就可以满足构建web服务时大部分的 api 的写法了。
来源:http://blog.iotalabs.io/
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