[docs] update CDK Tutorial: Python HTTP (#22069)

* [docs] update CDK Tutorial: Python HTTP

* Update airbyte-cdk/python/docs/tutorials/cdk-tutorial-python-http/6-read-data.md

Co-authored-by: Sergio Ropero <42538006+sergio-ropero@users.noreply.github.com>

* Code review

---------

Co-authored-by: Sergio Ropero <42538006+sergio-ropero@users.noreply.github.com>

airbyte-cdk/python/docs/tutorials/cdk-tutorial-python-http/0-getting-started.md

@@ -12,6 +12,10 @@ This is a step-by-step guide for how to create an Airbyte source in Python to re
 
 All the commands below assume that `python` points to a version of python >=3.9.0. On some systems, `python` points to a Python2 installation and `python3` points to Python3. If this is the case on your machine, substitute all `python` commands in this guide with `python3`.
 
+## Exchange Rates API Setup
+
+For this guide we will be making API calls to the Exchange Rates API. In order to generate the API access key that will be used by the new connector, you will have to follow steps on the [Exchange Rates API](https://exchangeratesapi.io/) by signing up for the Free tier plan. Once you have an API access key, you can continue with the guide.
+
 ## Checklist
 
 * Step 1: Create the source using the template

airbyte-cdk/python/docs/tutorials/cdk-tutorial-python-http/3-define-inputs.md

@@ -2,7 +2,7 @@
 
 Each connector declares the inputs it needs to read data from the underlying data source. This is the Airbyte Protocol's `spec` operation.
 
-The simplest way to implement this is by creating a `.json` file in `source_<name>/spec.json` which describes your connector's inputs according to the [ConnectorSpecification](https://github.com/airbytehq/airbyte/blob/master/airbyte-protocol/models/src/main/resources/airbyte_protocol/airbyte_protocol.yaml#L211) schema. This is a good place to start when developing your source. Using JsonSchema, define what the inputs are \(e.g. username and password\). Here's [an example](https://github.com/airbytehq/airbyte/blob/master/airbyte-integrations/connectors/source-freshdesk/source_freshdesk/spec.json) of what the `spec.json` looks like for the Freshdesk API source.
+The simplest way to implement this is by creating a `spec.json` file in `source_<name>/spec.json` which describes your connector's inputs according to the [ConnectorSpecification](https://github.com/airbytehq/airbyte/blob/master/airbyte-protocol/models/src/main/resources/airbyte_protocol/airbyte_protocol.yaml#L211) schema. This is a good place to start when developing your source. Using JsonSchema, define what the inputs are \(e.g. username and password\). Here's [an example](https://github.com/airbytehq/airbyte/blob/master/airbyte-integrations/connectors/source-freshdesk/source_freshdesk/spec.json) of what the `spec.json` looks like for the Freshdesk API source.
 
 For more details on what the spec is, you can read about the Airbyte Protocol [here](https://docs.airbyte.io/understanding-airbyte/airbyte-protocol).
 
@@ -17,8 +17,13 @@ Given that we'll pulling currency data for our example source, we'll define the
     "$schema": "http://json-schema.org/draft-07/schema#",
     "title": "Python Http Tutorial Spec",
     "type": "object",
-    "required": ["start_date", "currency_base"],
+    "required": ["apikey", "start_date", "base"],
     "properties": {
+      "apikey": {
+        "type": "string",
+        "description": "API access key used to retrieve data from the Exchange Rates API.",
+        "airbyte_secret": true
+      }
       "start_date": {
         "type": "string",
         "description": "Start getting data from that date.",
@@ -27,7 +32,7 @@ Given that we'll pulling currency data for our example source, we'll define the
       },
       "base": {
         "type": "string",
-        "examples": ["USD", "EUR"]
+        "examples": ["USD", "EUR"],
         "description": "ISO reference currency. See <a href=\"https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html\">here</a>."
       }
     }
@@ -40,8 +45,9 @@ Beside regular parameter there is intenal CDK config that started with '_' chara
 * _page_size - for http based streams set number of records for each page. Depends on stream implementation.
 
 
-In addition to metadata, we define two inputs:
+In addition to metadata, we define three inputs:
 
+* `apikey`: The API access key used to authenticate requests to the API
 * `start_date`: The beginning date to start tracking currency exchange rates from
 * `base`: The currency whose rates we're interested in tracking
 

airbyte-cdk/python/docs/tutorials/cdk-tutorial-python-http/4-connection-checking.md

@@ -4,6 +4,7 @@ The second operation in the Airbyte Protocol that we'll implement is the `check`
 
 This operation verifies that the input configuration supplied by the user can be used to connect to the underlying data source. Note that this user-supplied configuration has the values described in the `spec.json` filled in. In other words if the `spec.json` said that the source requires a `username` and `password` the config object might be `{ "username": "airbyte", "password": "password123" }`. You should then implement something that returns a json object reporting, given the credentials in the config, whether we were able to connect to the source.
 
+In order to make requests to the API, we need to specify the access.
 In our case, this is a fairly trivial check since the API requires no credentials. Instead, let's verify that the user-input `base` currency is a legitimate currency. In `source.py` we'll find the following autogenerated source:
 
 ```python
@@ -37,11 +38,11 @@ Following the docstring instructions, we'll change the implementation to verify
             return True, None
 ```
 
-Let's test out this implementation by creating two objects: a valid and an invalid config and attempt to give them as input to the connector
+Let's test out this implementation by creating two objects: a valid and an invalid config and attempt to give them as input to the connector. For this section, you will need to take the API access key generated earlier and add it to both configs. Because these configs contain secrets, we recommend storing configs which contain secrets in `secrets/config.json` because the `secrets` directory is gitignored by default. For the purpose of this example, a dummy apikey has been setup in `sample_files/config.json`.
 
 ```text
-echo '{"start_date": "2021-04-01", "base": "USD"}'  > sample_files/config.json
-echo '{"start_date": "2021-04-01", "base": "BTC"}'  > sample_files/invalid_config.json
+echo '{"start_date": "2021-04-01", "base": "USD", "apikey": <your_apikey>}'  > sample_files/config.json
+echo '{"start_date": "2021-04-01", "base": "BTC", "apikey": <your_apikey>}'  > sample_files/invalid_config.json
 python main.py check --config sample_files/config.json
 python main.py check --config sample_files/invalid_config.json
 ```

airbyte-cdk/python/docs/tutorials/cdk-tutorial-python-http/5-declare-schema.md

@@ -10,7 +10,7 @@ We'll begin by creating a stream to represent the data that we're pulling from t
 
 ```python
 class ExchangeRates(HttpStream):
-    url_base = "https://api.exchangeratesapi.io/"
+    url_base = "https://api.apilayer.com/exchangerates_data/"
 
     # Set this as a noop.
     primary_key = None

airbyte-cdk/python/docs/tutorials/cdk-tutorial-python-http/6-read-data.md

@@ -36,13 +36,14 @@ Let's begin by pulling data for the last day's rates by using the `/latest` endp
 
 ```python
 class ExchangeRates(HttpStream):
-    url_base = "https://api.exchangeratesapi.io/"
+    url_base = "https://api.apilayer.com/exchangerates_data/"
 
     primary_key = None
 
-    def __init__(self, base: str, **kwargs):
+    def __init__(self, config: Mapping[str, Any], **kwargs):
         super().__init__()
-        self.base = base
+        self.base = config['base']
+        self.apikey = config['apikey']
 
 
     def path(
@@ -54,6 +55,12 @@ class ExchangeRates(HttpStream):
         # The "/latest" path gives us the latest currency exchange rates
         return "latest"  
 
+    def request_headers(
+        self, stream_state: Mapping[str, Any], stream_slice: Mapping[str, Any] = None, next_page_token: Mapping[str, Any] = None
+    ) -> Mapping[str, Any]:
+        # The api requires that we include apikey as a header so we do that in this method
+        return {'apikey': self.apikey}
+
     def request_params(
             self,
             stream_state: Mapping[str, Any],
@@ -80,14 +87,20 @@ class ExchangeRates(HttpStream):
         return None
 ```
 
-This may look big, but that's just because there are lots of \(unused, for now\) parameters in these methods \(those can be hidden with Python's `**kwargs`, but don't worry about it for now\). Really we just added a few lines of "significant" code: 1. Added a constructor `__init__` which stores the `base` currency to query for. 2. `return {'base': self.base}` to add the `?base=<base-value>` query parameter to the request based on the `base` input by the user. 3. `return [response.json()]` to parse the response from the API to match the schema of our schema `.json` file. 4. `return "latest"` to indicate that we want to hit the `/latest` endpoint of the API to get the latest exchange rate data.
+This may look big, but that's just because there are lots of \(unused, for now\) parameters in these methods \(those can be hidden with Python's `**kwargs`, but don't worry about it for now\). Really we just added a few lines of "significant" code:
 
-Let's also pass the `base` parameter input by the user to the stream class:
+1. Added a constructor `__init__` which stores the `base` currency to query for and the `apikey` used for authentication.
+2. `return {'base': self.base}` to add the `?base=<base-value>` query parameter to the request based on the `base` input by the user.
+3. `return {'apikey': self.apikey}` to add the header `apikey=<apikey-string>` to the request based on the `apikey` input by the user.
+4. `return [response.json()]` to parse the response from the API to match the schema of our schema `.json` file.
+5. `return "latest"` to indicate that we want to hit the `/latest` endpoint of the API to get the latest exchange rate data.
+
+Let's also pass the config specified by the user to the stream class:
 
 ```python
     def streams(self, config: Mapping[str, Any]) -> List[Stream]:
         auth = NoAuth()
-        return [ExchangeRates(authenticator=auth, base=config['base'])]
+        return [ExchangeRates(authenticator=auth, config=config)]
 ```
 
 We're now ready to query the API!
@@ -127,20 +140,21 @@ Let's get the easy parts out of the way and pass the `start_date`:
 
 ```python
 def streams(self, config: Mapping[str, Any]) -> List[Stream]:
-        auth = NoAuth()
-        # Parse the date from a string into a datetime object
-        start_date = datetime.strptime(config['start_date'], '%Y-%m-%d') 
-        return [ExchangeRates(authenticator=auth, base=config['base'], start_date=start_date)]
+    auth = NoAuth()
+    # Parse the date from a string into a datetime object
+    start_date = datetime.strptime(config['start_date'], '%Y-%m-%d')
+    return [ExchangeRates(authenticator=auth, config=config, start_date=start_date)]
 ```
 
 Let's also add this parameter to the constructor and declare the `cursor_field`:
 
 ```python
 from datetime import datetime, timedelta
+from airbyte_cdk.sources.streams import IncrementalMixin
 
 
 class ExchangeRates(HttpStream, IncrementalMixin):
-    url_base = "https://api.exchangeratesapi.io/"
+    url_base = "https://api.apilayer.com/exchangerates_data/"
     cursor_field = "date"
     primary_key = "date"
 
@@ -176,7 +190,7 @@ Update internal state `cursor_value` inside `read_records` method
     def read_records(self, *args, **kwargs) -> Iterable[Mapping[str, Any]]:
         for record in super().read_records(*args, **kwargs):
             if self._cursor_value:
-                latest_record_date = datetime.strptime(latest_record[self.cursor_field], '%Y-%m-%d')
+                latest_record_date = datetime.strptime(record[self.cursor_field], '%Y-%m-%d')
                 self._cursor_value = max(self._cursor_value, latest_record_date)
             yield record
 

airbyte-integrations/connectors/source-python-http-tutorial/source_python_http_tutorial/source.py

@@ -14,7 +14,7 @@
 
 
 class ExchangeRates(HttpStream):
-    url_base = "http://api.exchangeratesapi.io/"
+    url_base = "https://api.apilayer.com/exchangerates_data/"
     cursor_field = "date"
     primary_key = "date"
 
@@ -34,14 +34,20 @@ def path(
     ) -> str:
         return stream_slice["date"]
 
+    def request_headers(
+        self, stream_state: Mapping[str, Any], stream_slice: Mapping[str, Any] = None, next_page_token: Mapping[str, Any] = None
+    ) -> Mapping[str, Any]:
+        # The api requires that we include apikey as a header so we do that in this method
+        return {'apikey': self.apikey}
+
     def request_params(
         self,
         stream_state: Mapping[str, Any],
         stream_slice: Mapping[str, Any] = None,
         next_page_token: Mapping[str, Any] = None,
     ) -> MutableMapping[str, Any]:
-        # The api requires that we include access_key as a query param so we do that in this method
-        return {"access_key": self.access_key}
+        # The api requires that we include the base currency as a query param so we do that in this method
+        return {'base': self.base}
 
     def parse_response(
         self,

airbyte-integrations/connectors/source-python-http-tutorial/source_python_http_tutorial/spec.json

@@ -1,27 +1,25 @@
 {
-  "documentationUrl": "https://docs.airbyte.com/integrations/sources/exchangeratesapi",
+  "documentationUrl": "https://docs.airbyte.io/integrations/sources/exchangeratesapi",
   "connectionSpecification": {
     "$schema": "http://json-schema.org/draft-07/schema#",
     "title": "Python Http Tutorial Spec",
     "type": "object",
-    "required": ["start_date", "base"],
-    "additionalProperties": false,
+    "required": ["apikey", "start_date", "base"],
     "properties": {
-      "access_key": {
-        "title": "Access Key",
+      "apikey": {
         "type": "string",
-        "description": "API access key used to retrieve data from the Exchange Rates API."
-      },
+        "description": "API access key used to retrieve data from the Exchange Rates API.",
+        "airbyte_secret": true
+      }
       "start_date": {
-        "title": "Start Date",
         "type": "string",
-        "description": "UTC date and time in the format 2017-01-25. Any data before this date will not be replicated.",
+        "description": "Start getting data from that date.",
         "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$",
-        "examples": ["YYYY-MM-DD"]
+        "examples": ["%Y-%m-%d"]
       },
       "base": {
-        "title": "Currency",
         "type": "string",
+        "examples": ["USD", "EUR"],
         "description": "ISO reference currency. See <a href=\"https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html\">here</a>."
       }
     }

docs/connector-development/tutorials/cdk-tutorial-python-http/connection-checking.md

@@ -4,7 +4,7 @@ The second operation in the Airbyte Protocol that we'll implement is the `check`
 
 This operation verifies that the input configuration supplied by the user can be used to connect to the underlying data source. Note that this user-supplied configuration has the values described in the `spec.yaml` filled in. In other words if the `spec.yaml` said that the source requires a `username` and `password` the config object might be `{ "username": "airbyte", "password": "password123" }`. You should then implement something that returns a json object reporting, given the credentials in the config, whether we were able to connect to the source.
 
-In order to make requests to the API, we need to specify the access. 
+In order to make requests to the API, we need to specify the access.
 In our case, this is a fairly trivial check since the API requires no credentials. Instead, let's verify that the user-input `base` currency is a legitimate currency. In `source.py` we'll find the following autogenerated source:
 
 ```python
@@ -44,8 +44,8 @@ Let's test out this implementation by creating two objects: a valid and an inval
 
 ```text
 mkdir sample_files
-echo '{"start_date": "2022-04-01", "base": "USD", "access_key": <your_access_key>}'  > secrets/config.json
-echo '{"start_date": "2022-04-01", "base": "BTC", "access_key": <your_access_key>}'  > secrets/invalid_config.json
+echo '{"start_date": "2022-04-01", "base": "USD", "apikey": <your_apikey>}'  > secrets/config.json
+echo '{"start_date": "2022-04-01", "base": "BTC", "apikey": <your_apikey>}'  > secrets/invalid_config.json
 python main.py check --config secrets/config.json
 python main.py check --config secrets/invalid_config.json
 ```
@@ -59,3 +59,5 @@ You should see output like the following:
 > python main.py check --config secrets/invalid_config.json
 {"type": "CONNECTION_STATUS", "connectionStatus": {"status": "FAILED", "message": "Input currency BTC is invalid. Please input one of the following currencies: {'DKK', 'USD', 'CZK', 'BGN', 'JPY'}"}}
 ```
+
+While developing, we recommend storing configs which contain secrets in `secrets/config.json` because the `secrets` directory is gitignored by default.

docs/connector-development/tutorials/cdk-tutorial-python-http/declare-schema.md

@@ -13,7 +13,7 @@ We'll begin by creating a stream to represent the data that we're pulling from t
 
 ```python
 class ExchangeRates(HttpStream):
-    url_base = "http://api.exchangeratesapi.io/"
+    url_base = "https://api.apilayer.com/exchangerates_data/"
 
     # Set this as a noop.
     primary_key = None

docs/connector-development/tutorials/cdk-tutorial-python-http/define-inputs.md

@@ -17,11 +17,11 @@ connectionSpecification:
   title: Python Http Tutorial Spec
   type: object
   required:
-    - access_key
+    - apikey
     - start_date
     - base
   properties:
-    access_key:
+    apikey:
       type: string
       description: API access key used to retrieve data from the Exchange Rates API.
       airbyte_secret: true
@@ -39,9 +39,9 @@ connectionSpecification:
       description: "ISO reference currency. See <a href=\"https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html\">here</a>."
 ```
 
-In addition to metadata, we define two inputs:
+In addition to metadata, we define three inputs:
 
-* `access_key`: The API access key used to authenticate requests to the API
+* `apikey`: The API access key used to authenticate requests to the API
 * `start_date`: The beginning date to start tracking currency exchange rates from
 * `base`: The currency whose rates we're interested in tracking