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Has Suffix

Checks if a string ends with a specified suffix, returning true or false.

Common Properties​

  • Name - The custom name of the node.
  • Color - The custom color of the node.
  • Delay Before (sec) - Waits in seconds before executing the node.
  • Delay After (sec) - Waits in seconds after executing node.
  • Continue On Error - Automation will continue regardless of any error. The default value is false.
info

If the ContinueOnError property is true, no error is caught when the project is executed, even if a Catch node is used.

Inputs​

  • String - The string to check.
  • Suffix - The suffix to look for at the end of the string.

Options​

This node does not have configurable options.

Output​

  • Result - Boolean value: true if string ends with suffix, false otherwise.

How It Works​

The Has Suffix node checks if a string ends with the specified suffix:

  • Case-sensitive: ".PDF" and ".pdf" are different
  • Exact match: Suffix must match exactly at the end
  • Returns boolean: true if ends with suffix, false otherwise
  • Empty suffix: Always returns true

Usage Examples​

Example 1: Check File Extension​

  • String: "document.pdf"
  • Suffix: ".pdf"
  • Result: true

Example 2: Validate Email Domain​

  • String: "user@example.com"
  • Suffix: ".com"
  • Result: true

Example 3: Check URL Path​

  • String: "https://api.example.com/v1/users"
  • Suffix: "/users"
  • Result: true

Example 4: Case Sensitivity​

  • String: "image.PNG"
  • Suffix: ".png"
  • Result: false (different case)

Example 5: Suffix Not Matching​

  • String: "document.pdf"
  • Suffix: ".xlsx"
  • Result: false

Tips​

  • Perfect for file extension validation
  • Use for domain validation (email, URLs)
  • Great for endpoint checking in APIs
  • Search is case-sensitive - use Lowercase node first for case-insensitive check
  • More specific than Includes - only checks the end
  • Use with If node for conditional file processing

Common Errors and Solutions​

Error: Returns false when suffix should match

  • Cause: Case sensitivity mismatch (.jpg vs .JPG)
  • Solution: Convert both to same case before checking: 
    1. Lowercase both string and suffix
    2. Then use HasSuffix

Error: Extra spaces causing mismatch

  • Cause: Trailing whitespace in string
  • Solution: Use Trim node first to remove trailing whitespace

Practical RPA Examples​

Example: Filter PDF Files​

String: ${msg.filename}
Suffix: ".pdf"
Result: true/false
Action: Process only PDF files

Example: Validate Image Files​

String: ${msg.file}
Suffixes to check: ".jpg", ".png", ".gif"
Action: Accept only image files

Example: Check Corporate Email​

String: ${msg.email}
Suffix: "@company.com"
Result: true
Action: Verify employee email

Example: Detect API Version​

String: ${msg.endpoint}
Suffix: "/v2"
Result: true
Action: Use v2 API handlers

Example: Validate Compressed Files​

String: ${msg.filename}
Suffix: ".zip"
Result: true
Action: Extract archive

Example: Check Script Files​

String: ${msg.file}
Suffix: ".js"
Result: true
Action: Execute JavaScript file

Pattern: Multiple File Type Validation​

Check for multiple acceptable extensions:

Check 1: HasSuffix ".xlsx"
Check 2: HasSuffix ".xls"
Check 3: HasSuffix ".csv"
Result: Accept if any check returns true

Pattern: File Type Routing​

Route files based on extension:

If HasSuffix ".pdf" → PDF processing
If HasSuffix ".xlsx" → Excel processing
If HasSuffix ".csv" → CSV processing
Else → Unsupported file type error

Case-Insensitive Suffix Check​

For case-insensitive matching (important for file extensions):

Step 1: Lowercase on input string
Step 2: Lowercase on suffix
Step 3: HasSuffix check
Result: Case-insensitive suffix match

Example:
"IMAGE.PNG" → "image.png"
".png" → ".png"
Result: true

Common File Extension Checks​

Document Files​

  • .pdf, .doc, .docx, .txt

Spreadsheets​

  • .xlsx, .xls, .csv

Images​

  • .jpg, .jpeg, .png, .gif, .bmp

Archives​

  • .zip, .rar, .tar, .gz

Code Files​

  • .js, .py, .java, .go

Combining with HasPrefix​

Validate both start and end:

Example: Validate file path and extension
1. HasPrefix "/uploads/" → Check directory
2. HasSuffix ".pdf" → Check file type
Both must be true for valid file
  • HasPrefix - Check if starts with prefix
  • Includes - Check if contains substring
  • LastIndex - Find last occurrence (e.g., last dot)
  • Lowercase - For case-insensitive checks
  • Trim - Remove trailing whitespace before check