File Format Specifications for .JSP

The .JSP file format refers to JavaServer Pages (also known as Jakarta Server Pages), a text-based format used for creating dynamic web content. It is not a binary format but a scripting technology where files contain a mix of static template data (e.g., HTML, XML) and dynamic elements like Java code, directives, actions, and expressions. Specifications are defined in the Jakarta Server Pages (JSP) standard, part of Jakarta EE (formerly Java EE). The latest specification as of my knowledge is JSP 3.1, but core details remain consistent from JSP 3.0. Key aspects include:

• File Extension: Primarily .jsp; .jspx for XML-compliant variants; .jspf for fragments.
• MIME Type: application/jsp.
• Structure: Text file with elements (directives, scriptlets, expressions, actions) interspersed with template text. Translated into Java servlets at runtime.
• Syntax: Standard syntax uses <% ... %> for scripting; XML syntax uses jsp:... tags. Supports Expression Language (EL) with ${...} or #{...}.
• Encoding: Defaults to ISO-8859-1; configurable via pageEncoding or BOM (e.g., UTF-8 BOM: EF BB BF).
• Translation/Execution: Files are compiled into servlets; supports scopes (page, request, session, application) and implicit objects (e.g., request, response, out).

1. List of all the properties of this file format intrinsic to its file system.

These properties are derived from the page directive (<%@ page ... %>), which defines core attributes for a .JSP file. They are intrinsic as they control the file's behavior, encoding, and runtime properties within the web container/file system context. Not all may be present in every file; defaults apply if omitted.

• language: Specifies the scripting language (default: "java").
• extends: Class the generated servlet extends.
• import: Java packages/classes to import (comma-separated).
• session: Whether the page participates in a session (true/false; default: true).
• buffer: Output buffer size (e.g., "8kb"; default: "8kb").
• autoFlush: Whether to auto-flush the buffer (true/false; default: true).
• isThreadSafe: Whether the page is thread-safe (true/false; default: true).
• info: Descriptive info string.
• errorPage: URL of error-handling page.
• isErrorPage: Whether this is an error page (true/false; default: false).
• contentType: MIME type and charset (e.g., "text/html; charset=UTF-8").
• pageEncoding: Character encoding (e.g., "UTF-8").
• isELIgnored: Whether EL is ignored (true/false; default: false).
• deferredSyntaxAllowedAsLiteral: Allows #{ or ${ as literals (true/false; default: false).
• trimDirectiveWhitespaces: Trims whitespace around directives (true/false; default: false).

1. Two direct download links for files of format .JSP.

• https://gist.githubusercontent.com/nikallass/5ceef8c8c02d58ca2c69a29a92d2f461/raw/5b1a166107f590c6ca703749de2c5f9b32ca99fc/cmd.jsp
• https://gist.githubusercontent.com/ShubhamS32/3ee64092d96da18ff5331e592e621bcc/raw/8c8bf8c2a3c7c650f6c9f2f9ff3c2a5c5f8f2f38/FileUpload.jsp

1. Write a ghost blog embedded html javascript that allows a user to drag n drop a file of format .JSP and it will dump to screen all these properties.

Here's an HTML file with embedded JavaScript for drag-and-drop functionality. It reads the dropped .JSP file, parses the page directive using regex, extracts the properties, and displays them on the screen. Save this as an .html file and open in a browser.

Drag and Drop .JSP File

1. Write a python class that can open any file of format .JSP and decode read and write and print to console all the properties from the above list.

import re
import os

class JSPParser:
    def __init__(self, filepath):
        self.filepath = filepath
        self.properties = {}
        self.content = ""

    def read_and_decode(self):
        if not os.path.exists(self.filepath) or not self.filepath.endswith('.jsp'):
            print("Invalid .JSP file.")
            return
        with open(self.filepath, 'r', encoding='utf-8') as f:
            self.content = f.read()
        directive_regex = re.compile(r'<%@\s*page\s+([^%>]+)%>', re.IGNORECASE)
        match = directive_regex.search(self.content)
        if match:
            attrs = match.group(1)
            prop_regex = re.compile(r'(\w+)\s*=\s*"([^"]*)"')
            for key, value in prop_regex.findall(attrs):
                self.properties[key] = value
        self.print_properties()

    def print_properties(self):
        if not self.properties:
            print("No properties found in the page directive.")
            return
        print("Extracted JSP Properties:")
        for key, value in self.properties.items():
            print(f"{key}: {value}")

    def write(self, new_filepath, new_properties=None):
        if new_properties:
            self.properties.update(new_properties)
        directive = '<%@ page ' + ' '.join([f'{k}="{v}"' for k, v in self.properties.items()]) + ' %>'
        new_content = directive + '\n' + self.content if self.content else directive
        with open(new_filepath, 'w', encoding='utf-8') as f:
            f.write(new_content)
        print(f"Written to {new_filepath}")

# Example usage:
# parser = JSPParser('example.jsp')
# parser.read_and_decode()
# parser.write('new.jsp', {'contentType': 'text/html; charset=UTF-8'})

1. Write a java class that can open any file of format .JSP and decode read and write and print to console all the properties from the above list.

import java.io.*;
import java.util.*;
import java.util.regex.*;

public class JSPParser {
    private String filepath;
    private Map<String, String> properties = new HashMap<>();
    private String content = "";

    public JSPParser(String filepath) {
        this.filepath = filepath;
    }

    public void readAndDecode() throws IOException {
        if (!filepath.endsWith(".jsp")) {
            System.out.println("Invalid .JSP file.");
            return;
        }
        StringBuilder sb = new StringBuilder();
        try (BufferedReader br = new BufferedReader(new FileReader(filepath))) {
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line).append("\n");
            }
        }
        content = sb.toString();
        Pattern directivePattern = Pattern.compile("<%@\\s*page\\s+([^%>]+)%>", Pattern.CASE_INSENSITIVE);
        Matcher matcher = directivePattern.matcher(content);
        if (matcher.find()) {
            String attrs = matcher.group(1);
            Pattern propPattern = Pattern.compile("(\\w+)\\s*=\\s*\"([^\"]*)\"");
            Matcher propMatcher = propPattern.matcher(attrs);
            while (propMatcher.find()) {
                properties.put(propMatcher.group(1), propMatcher.group(2));
            }
        }
        printProperties();
    }

    public void printProperties() {
        if (properties.isEmpty()) {
            System.out.println("No properties found in the page directive.");
            return;
        }
        System.out.println("Extracted JSP Properties:");
        for (Map.Entry<String, String> entry : properties.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
    }

    public void write(String newFilepath, Map<String, String> newProperties) throws IOException {
        if (newProperties != null) {
            properties.putAll(newProperties);
        }
        StringBuilder directive = new StringBuilder("<%@ page ");
        for (Map.Entry<String, String> entry : properties.entrySet()) {
            directive.append(entry.getKey()).append("=\"").append(entry.getValue()).append("\" ");
        }
        directive.append("%>");
        String newContent = directive + "\n" + (content.isEmpty() ? "" : content);
        try (BufferedWriter bw = new BufferedWriter(new FileWriter(newFilepath))) {
            bw.write(newContent);
        }
        System.out.println("Written to " + newFilepath);
    }

    // Example usage:
    // public static void main(String[] args) throws IOException {
    //     JSPParser parser = new JSPParser("example.jsp");
    //     parser.readAndDecode();
    //     Map<String, String> updates = new HashMap<>();
    //     updates.put("contentType", "text/html; charset=UTF-8");
    //     parser.write("new.jsp", updates);
    // }
}

1. Write a javascript class that can open any file of format .JSP and decode read and write and print to console all the properties from the above list.

This is for Node.js (since browser JS can't directly read/write local files without user interaction).

const fs = require('fs');

class JSPParser {
    constructor(filepath) {
        this.filepath = filepath;
        this.properties = {};
        this.content = '';
    }

    readAndDecode() {
        if (!this.filepath.endsWith('.jsp')) {
            console.log('Invalid .JSP file.');
            return;
        }
        this.content = fs.readFileSync(this.filepath, 'utf-8');
        const directiveRegex = /<%@\s*page\s+([^%>]+)%>/gi;
        const match = directiveRegex.exec(this.content);
        if (match) {
            const attrs = match[1];
            const propRegex = /(\w+)\s*=\s*"([^"]*)"/g;
            let attrMatch;
            while ((attrMatch = propRegex.exec(attrs)) !== null) {
                this.properties[attrMatch[1]] = attrMatch[2];
            }
        }
        this.printProperties();
    }

    printProperties() {
        if (Object.keys(this.properties).length === 0) {
            console.log('No properties found in the page directive.');
            return;
        }
        console.log('Extracted JSP Properties:');
        for (const [key, value] of Object.entries(this.properties)) {
            console.log(`${key}: ${value}`);
        }
    }

    write(newFilepath, newProperties = {}) {
        Object.assign(this.properties, newProperties);
        let directive = '<%@ page ' + Object.entries(this.properties).map(([k, v]) => `${k}="${v}"`).join(' ') + ' %>';
        const newContent = directive + '\n' + this.content;
        fs.writeFileSync(newFilepath, newContent, 'utf-8');
        console.log(`Written to ${newFilepath}`);
    }
}

// Example usage:
// const parser = new JSPParser('example.jsp');
// parser.readAndDecode();
// parser.write('new.jsp', { contentType: 'text/html; charset=UTF-8' });

1. Write a c class that can open any file of format .JSP and decode read and write and print to console all the properties from the above list.

This is in C++ (since standard C lacks classes; assuming "c class" means C++).

#include <iostream>
#include <fstream>
#include <string>
#include <regex>
#include <map>

class JSPParser {
private:
    std::string filepath;
    std::map<std::string, std::string> properties;
    std::string content;

public:
    JSPParser(const std::string& fp) : filepath(fp) {}

    void readAndDecode() {
        if (filepath.substr(filepath.find_last_of(".") + 1) != "jsp") {
            std::cout << "Invalid .JSP file." << std::endl;
            return;
        }
        std::ifstream file(filepath);
        if (!file.is_open()) {
            std::cout << "Failed to open file." << std::endl;
            return;
        }
        std::string line;
        while (std::getline(file, line)) {
            content += line + "\n";
        }
        file.close();
        std::regex directiveRegex(R"(<%@\s*page\s+([^%>]+)%>)", std::regex_constants::icase);
        std::smatch match;
        if (std::regex_search(content, match, directiveRegex)) {
            std::string attrs = match[1].str();
            std::regex propRegex(R"((\w+)\s*=\s*"([^"]*)")");
            std::sregex_iterator iter(attrs.begin(), attrs.end(), propRegex);
            std::sregex_iterator end;
            for (; iter != end; ++iter) {
                properties[(*iter)[1].str()] = (*iter)[2].str();
            }
        }
        printProperties();
    }

    void printProperties() {
        if (properties.empty()) {
            std::cout << "No properties found in the page directive." << std::endl;
            return;
        }
        std::cout << "Extracted JSP Properties:" << std::endl;
        for (const auto& pair : properties) {
            std::cout << pair.first << ": " << pair.second << std::endl;
        }
    }

    void write(const std::string& newFilepath, const std::map<std::string, std::string>& newProperties = {}) {
        for (const auto& pair : newProperties) {
            properties[pair.first] = pair.second;
        }
        std::string directive = "<%@ page ";
        for (const auto& pair : properties) {
            directive += pair.first + "=\"" + pair.second + "\" ";
        }
        directive += "%>";
        std::string newContent = directive + "\n" + content;
        std::ofstream outFile(newFilepath);
        if (outFile.is_open()) {
            outFile << newContent;
            outFile.close();
            std::cout << "Written to " << newFilepath << std::endl;
        } else {
            std::cout << "Failed to write file." << std::endl;
        }
    }
};

// Example usage:
// int main() {
//     JSPParser parser("example.jsp");
//     parser.readAndDecode();
//     std::map<std::string, std::string> updates = {{"contentType", "text/html; charset=UTF-8"}};
//     parser.write("new.jsp", updates);
//     return 0;
// }