2024 07 10 creating querystring dictionary handling axios querystrings improving parsecommand function - bizkite-co/handterm GitHub Wiki


original file name: Codeium Chat - CWB8Z66asLIy1nhf6Ga3kKyM2fH98pW3.md summary: The user wanted to create a querystring name/value dictionary in a function for combining them into a querystring parameter for a function call. They inquired about TypeScript and Axios objects that handle querystrings. I provided information on using the URLSearchParams interface in TypeScript for query string manipulation and how to pass query parameters to Axios requests.

Later, the user shared a function where they needed to pass parameters as query string parameters (key and limit) in an Axios request. I guided them on using the params property in the Axios request configuration to automatically handle query parameters.

Lastly, the user shared a parseCommand function used to parse commands with arguments and switches. They wanted to enhance the function to support switches with values like those in PowerShell or bash. I provided an updated version of the parseCommand function that supports boolean switches as well as switches with values, making the command parsing more flexible and powerful. date: 2024-07-10T07:53

Codeium Chat Conversation

Note: This is purely the output of the chat conversation and does not contain any raw data, codebase snippets, etc. used to generate the output.

User at 7:53 am, Jul 10, 2024

I want to create and use a querystring name/value dictionary in a function where I will be combining them into a querystring parameter for a function call.

Are there types or objects provided by TypeScript or Axios that handle this?


Codeium at 7:53 am, Jul 10, 2024

In TypeScript, you can use the URLSearchParams interface to create and manipulate a query string. This interface is part of the URL standard and is available in modern browsers and Node.js environments. It provides a convenient way to construct query strings without manually concatenating string values.

While Axios itself doesn't provide a specific type or object for handling query strings, it automatically handles query strings if you provide them as an object in the params property of the Axios request configuration.

Here's an example of how you can use URLSearchParams in TypeScript and how you can provide query parameters to Axios:

Using URLSearchParams

const params = new URLSearchParams({
  key1: 'value1',
  key2: 'value2',
});
const queryString = params.toString(); // "key1=value1&key2=value2"

// Use queryString in a URL
const url = `https://example.com/api?${queryString}`;

Providing Query Parameters to Axios

When making a request with Axios, you can directly provide an object as the params property, and Axios will convert it into a query string.

import axios from 'axios';

const queryParams = {
  key1: 'value1',
  key2: 'value2',
};

axios.get('https://example.com/api', { params: queryParams })
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.error('Error:', error);
  });

In this Axios example, you don't need to manually create the query string; Axios handles it for you when you specify the params option.

Both methods are standard in TypeScript development, and the choice between them depends on your specific needs and whether you are directly constructing URLs or making HTTP requests with Axios.

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User at 7:57 am, Jul 10, 2024

I have two parameters in my function. I would like to pass them as querystring parameters (key, and limit)

 const getLog = async (key: string, limit: number = 10): Promise<AsyncResponse<any>> => {
  try {
   const authConfig = await getAuthConfig();
   const keyString = key ? `?key=${key}` : '';
   const response = await axios.get(`${API_URL}${ENDPOINTS.api.GetLog}${keyString}`, authConfig.data);
   return {status: 200, data: response.data, error: []}; // Contains log content, etc.
  } catch (error: any) {
   return {
    status: 404,
    error: ['Error fetching log', error.message],
    data: null
   };
  }
 }

Codeium at 7:58 am, Jul 10, 2024

To pass both key and limit as query string parameters in your function using Axios, you can leverage the params object in the Axios request configuration. This way, you don't need to manually construct the query string. Here's how you can modify your getLog function:

const getLog = async (key: string, limit: number = 10): Promise<AsyncResponset<any>> => {
  try {
    const authConfig = await getAuthConfig();
    // Prepare the query parameters
    const params = {
      key: key,
      limit: limit, // Assuming your API expects a 'limit' parameter
    };
    // Make the request with the params object
    const response = await axios.get(`${API_URL}${ENDPOINTS.api.GetLog}`, { ...authConfig.data, params });
    return { status: 200, data: response.data, error: [] };
  } catch (error: any) {
    return {
      status: 404,
      error: ['Error fetching log', error.message],
      data: null
    };
  }
}

A few notes on the changes:

  • The params object is directly passed to Axios in the request configuration. Axios automatically appends these parameters to the query string of the URL.
  • Ensure that authConfig.data is correctly structured to be used as Axios request configuration. If authConfig.data contains other configuration properties besides headers (like headers), you might need to adjust the code to merge params properly. Typically, headers and other Axios configurations are specified separately, so if authConfig.data includes headers, you might need to refactor it as follows:
const response = await axios.get(`${API_URL}${ENDPOINTS.api.GetLog}`, { 
  headers: authConfig.data.headers, // Assuming authConfig.data contains headers
  params 
});
  • This refactored function automatically encodes the query parameters, making it safer and more reliable, especially if key includes characters that must be URL-encoded.

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User at 8:24 am, Jul 10, 2024

I am using this parseCommand to parse the command from following arguments and switches.

 private parseCommand(input: string): { command: string, args: string[], switches: Record<string, boolean> } {
  const parts = input.split(/\s+/); // Split by whitespace
  const command = parts.shift(); // The first element is the command
  const args = [];
  const switches: Record<string, boolean> = {};

  if (command) {
   for (const part of parts) {
    if (part.startsWith('--')) {
     // It's a switch, remove the '--' and set it to true in the switches object
     const switchName = part.substring(2);
     switches[switchName] = true;
    } else {
     // It's an argument
     args.push(part);
    }
   }
  }

  return { command: command || '', args, switches };
 }

I think the switches are currently boolean. They either exist or don't. What I would like to do is to make them more like PowerShell or bash commands, where a switch can be followed by a value, which then becomes the value of the switch.


Codeium at 8:24 am, Jul 10, 2024

To enhance your parseCommand function to support switches with values (similar to how PowerShell or bash commands work), you can modify the function to check for an equals sign (=) or the presence of a value following the switch. This will allow you to differentiate between boolean switches and switches with specific values.

Here's an updated version of your parseCommand function that supports both boolean switches and switches with values:

private parseCommand(input: string): { command: string, args: string[], switches: Record<string, boolean | string> } {
  const parts = input.split(/\s+/); // Split by whitespace
  const command = parts.shift(); // The first element is the command
  const args = [];
  const switches: Record<string, boolean | string> = {};

  if (command) {
    for (let i = 0; i < parts.length; i++) {
      const part = parts[i];
      if (part.startsWith('--')) {
        const switchAssignmentIndex = part.indexOf('=');
        if (switchAssignmentIndex > -1) {
          // It's a switch with an explicit value
          const switchName = part.substring(2, switchAssignmentIndex);
          const switchValue = part.substring(switchAssignmentIndex + 1);
          switches[switchName] = switchValue;
        } else {
          // It's a boolean switch or a switch with a value that's the next part
          const switchName = part.substring(2);
          // Look ahead to see if the next part is a value for this switch
          if (i + 1 < parts.length && !parts[i + 1].startsWith('--')) {
            switches[switchName] = parts[++i]; // Use the next part as the value and increment i
          } else {
            switches[switchName] = true; // No value provided, treat it as a boolean switch
          }
        }
      } else {
        // It's an argument
        args.push(part);
      }
    }
  }

  return { command: command || '', args, switches };
}

This function now supports three kinds of switches:

  1. Boolean switches (e.g., --verbose), which are set to true when present.
  2. Switches with an explicit value using the equals sign (e.g., --output=file.txt).
  3. Switches followed by their value as the next argument (e.g., --filter text), assuming the next part does not start with --.

This approach makes your command parsing more flexible and powerful, allowing for a wider range of command-line interfaces and scripting scenarios.

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