Http

Http source connector

Description​

Used to read data from Http.

Key features​

• batch

• stream

• exactly-once

• column projection

• parallelism

• support user-defined split

Supported DataSource Info​

Datasource	Supported Versions
Http	universal

Source Options​

Name	Type	Required	Default	Description
url	String	Yes	-	Http request url.
schema	Config	No	-	Http and Nexus data structure mapping
schema.fields	Config	No	-	The schema fields of upstream data
json_field	Config	No	-	This parameter helps you configure the schema,so this parameter must be used with schema.
pageing	Config	No	-	This parameter is used for paging queries
pageing.page_field	String	No	-	This parameter is used to specify the page field name in the request parameter
pageing.total_page_size	Int	No	-	This parameter is used to control the total number of pages
pageing.batch_size	Int	No	-	The batch size returned per request is used to determine whether to continue when the total number of pages is unknown
content_json	String	No	-	This parameter can get some json data.If you only need the data in the 'book' section, configure content_field = "$.store.book.*".
format	String	No	text	The format of upstream data, now only support json text, default text.
method	String	No	get	Http request method, only supports GET, POST method.
headers	Map	No	-	Http headers.
params	Map	No	-	Http params,the program will automatically add http header application/x-www-form-urlencoded.
body	String	No	-	Http body,the program will automatically add http header application/json,body is jsonbody.
poll_interval_millis	Int	No	-	Request http api interval(millis) in stream mode.
retry	Int	No	-	The max retry times if request http return to IOException.
retry_backoff_multiplier_ms	Int	No	100	The retry-backoff times(millis) multiplier if request http failed.
retry_backoff_max_ms	Int	No	10000	The maximum retry-backoff times(millis) if request http failed
enable_multi_lines	Boolean	No	false
connect_timeout_ms	Int	No	12000	Connection timeout setting, default 12s.
socket_timeout_ms	Int	No	60000	Socket timeout setting, default 60s.
common-options		No	-	Source plugin common parameters, please refer to Source Common Options for details

How to Create a Http Data Synchronization Jobs​

env {
  parallelism = 1
  job.mode = "BATCH"
}

source {
  Http {
    result_table_name = "http"
    url = "http://mockserver:1080/example/http"
    method = "GET"
    format = "json"
    schema = {
      fields {
        c_map = "map<string, string>"
        c_array = "array<int>"
        c_string = string
        c_boolean = boolean
        c_tinyint = tinyint
        c_smallint = smallint
        c_int = int
        c_bigint = bigint
        c_float = float
        c_double = double
        c_bytes = bytes
        c_date = date
        c_decimal = "decimal(38, 18)"
        c_timestamp = timestamp
        c_row = {
          C_MAP = "map<string, string>"
          C_ARRAY = "array<int>"
          C_STRING = string
          C_BOOLEAN = boolean
          C_TINYINT = tinyint
          C_SMALLINT = smallint
          C_INT = int
          C_BIGINT = bigint
          C_FLOAT = float
          C_DOUBLE = double
          C_BYTES = bytes
          C_DATE = date
          C_DECIMAL = "decimal(38, 18)"
          C_TIMESTAMP = timestamp
        }
      }
    }
  }
}

# Console printing of the read Http data
sink {
  Console {
    parallelism = 1
  }
}

Parameter Interpretation​

format​

when you assign format is json, you should also assign schema option, for example:

upstream data is the following:

{
  "code": 200,
  "data": "get success",
  "success": true
}

you should assign schema as the following:

schema {
  fields {
    code = int
    data = string
    success = boolean
  }
}

connector will generate data as the following:

code	data	success
200	get success	true

when you assign format is text, connector will do nothing for upstream data, for example:

upstream data is the following:

{
  "code": 200,
  "data": "get success",
  "success": true
}

connector will generate data as the following:

content
{"code": 200, "data": "get success", "success": true}

content_json​

This parameter can get some json data.If you only need the data in the 'book' section, configure content_field = "$.store.book.*".

If your return data looks something like this.

{
  "store": {
    "book": [
      {
        "category": "reference",
        "author": "Nigel Rees",
        "title": "Sayings of the Century",
        "price": 8.95
      },
      {
        "category": "fiction",
        "author": "Evelyn Waugh",
        "title": "Sword of Honour",
        "price": 12.99
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 19.95
    }
  },
  "expensive": 10
}

You can configure content_field = "$.store.book.*" and the result returned looks like this:

[
  {
    "category": "reference",
    "author": "Nigel Rees",
    "title": "Sayings of the Century",
    "price": 8.95
  },
  {
    "category": "fiction",
    "author": "Evelyn Waugh",
    "title": "Sword of Honour",
    "price": 12.99
  }
]

Then you can get the desired result with a simpler schema,like

Http {
  url = "http://mockserver:1080/contentjson/mock"
  method = "GET"
  format = "json"
  content_field = "$.store.book.*"
  schema = {
    fields {
      category = string
      author = string
      title = string
      price = string
    }
  }
}

Here is an example:

• Test data can be found at this link mockserver-config.json
• See this link for task configuration http_contentjson_to_assert.conf.

json_field​

This parameter helps you configure the schema,so this parameter must be used with schema.

If your data looks something like this:

{ 
  "store": {
    "book": [
      {
        "category": "reference",
        "author": "Nigel Rees",
        "title": "Sayings of the Century",
        "price": 8.95
      },
      {
        "category": "fiction",
        "author": "Evelyn Waugh",
        "title": "Sword of Honour",
        "price": 12.99
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 19.95
    }
  },
  "expensive": 10
}

You can get the contents of 'book' by configuring the task as follows:

source {
  Http {
    url = "http://mockserver:1080/jsonpath/mock"
    method = "GET"
    format = "json"
    json_field = {
      category = "$.store.book[*].category"
      author = "$.store.book[*].author"
      title = "$.store.book[*].title"
      price = "$.store.book[*].price"
    }
    schema = {
      fields {
        category = string
        author = string
        title = string
        price = string
      }
    }
  }
}

• Test data can be found at this link mockserver-config.json
• See this link for task configuration http_jsonpath_to_assert.conf.

pageing​

source {
    Http {
      url = "http://localhost:8080/mock/queryData"
      method = "GET"
      format = "json"
      params={
       page: "${page}"
      }
      content_field = "$.data.*"
      pageing={
       total_page_size=20
       page_field=page
       #when don't know the total_page_size use batch_size if read size<batch_size finish ,otherwise continue
       #batch_size=10
      }
      schema = {
        fields {
          name = string
          age = string
        }
      }
    }
}