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Viewing file:     parsers.js (8.43 KB)      -rw-r--r--

import { addContextToFrame, basename, dirname, SyncPromise } from '@sentry/utils';
import { readFile } from 'fs';
import { LRUMap } from 'lru_map';
import * as stacktrace from './stacktrace';
var DEFAULT_LINES_OF_CONTEXT = 7;
var FILE_CONTENT_CACHE = new LRUMap(100);
/**
 * Resets the file cache. Exists for testing purposes.
 * @hidden
 */
export function resetFileContentCache() {
    FILE_CONTENT_CACHE.clear();
}
/** JSDoc */
function getFunction(frame) {
    try {
        return frame.functionName || frame.typeName + "." + (frame.methodName || '<anonymous>');
    }
    catch (e) {
        // This seems to happen sometimes when using 'use strict',
        // stemming from `getTypeName`.
        // [TypeError: Cannot read property 'constructor' of undefined]
        return '<anonymous>';
    }
}
var mainModule = ((require.main && require.main.filename && dirname(require.main.filename)) ||
    global.process.cwd()) + "/";
/** JSDoc */
function getModule(filename, base) {
    if (!base) {
        // eslint-disable-next-line no-param-reassign
        base = mainModule;
    }
    // It's specifically a module
    var file = basename(filename, '.js');
    // eslint-disable-next-line no-param-reassign
    filename = dirname(filename);
    var n = filename.lastIndexOf('/node_modules/');
    if (n > -1) {
        // /node_modules/ is 14 chars
        return filename.substr(n + 14).replace(/\//g, '.') + ":" + file;
    }
    // Let's see if it's a part of the main module
    // To be a part of main module, it has to share the same base
    n = (filename + "/").lastIndexOf(base, 0);
    if (n === 0) {
        var moduleName = filename.substr(base.length).replace(/\//g, '.');
        if (moduleName) {
            moduleName += ':';
        }
        moduleName += file;
        return moduleName;
    }
    return file;
}
/**
 * This function reads file contents and caches them in a global LRU cache.
 * Returns a Promise filepath => content array for all files that we were able to read.
 *
 * @param filenames Array of filepaths to read content from.
 */
function readSourceFiles(filenames) {
    // we're relying on filenames being de-duped already
    if (filenames.length === 0) {
        return SyncPromise.resolve({});
    }
    return new SyncPromise(function (resolve) {
        var sourceFiles = {};
        var count = 0;
        var _loop_1 = function (i) {
            var filename = filenames[i];
            var cache = FILE_CONTENT_CACHE.get(filename);
            // We have a cache hit
            if (cache !== undefined) {
                // If it's not null (which means we found a file and have a content)
                // we set the content and return it later.
                if (cache !== null) {
                    sourceFiles[filename] = cache;
                }
                // eslint-disable-next-line no-plusplus
                count++;
                // In any case we want to skip here then since we have a content already or we couldn't
                // read the file and don't want to try again.
                if (count === filenames.length) {
                    resolve(sourceFiles);
                }
                return "continue";
            }
            readFile(filename, function (err, data) {
                var content = err ? null : data.toString();
                sourceFiles[filename] = content;
                // We always want to set the cache, even to null which means there was an error reading the file.
                // We do not want to try to read the file again.
                FILE_CONTENT_CACHE.set(filename, content);
                // eslint-disable-next-line no-plusplus
                count++;
                if (count === filenames.length) {
                    resolve(sourceFiles);
                }
            });
        };
        // eslint-disable-next-line @typescript-eslint/prefer-for-of
        for (var i = 0; i < filenames.length; i++) {
            _loop_1(i);
        }
    });
}
/**
 * @hidden
 */
export function extractStackFromError(error) {
    var stack = stacktrace.parse(error);
    if (!stack) {
        return [];
    }
    return stack;
}
/**
 * @hidden
 */
export function parseStack(stack, options) {
    var filesToRead = [];
    var linesOfContext = options && options.frameContextLines !== undefined ? options.frameContextLines : DEFAULT_LINES_OF_CONTEXT;
    var frames = stack.map(function (frame) {
        var parsedFrame = {
            colno: frame.columnNumber,
            filename: frame.fileName || '',
            function: getFunction(frame),
            lineno: frame.lineNumber,
        };
        var isInternal = frame.native ||
            (parsedFrame.filename &&
                !parsedFrame.filename.startsWith('/') &&
                !parsedFrame.filename.startsWith('.') &&
                parsedFrame.filename.indexOf(':\\') !== 1);
        // in_app is all that's not an internal Node function or a module within node_modules
        // note that isNative appears to return true even for node core libraries
        // see https://github.com/getsentry/raven-node/issues/176
        parsedFrame.in_app =
            !isInternal && parsedFrame.filename !== undefined && parsedFrame.filename.indexOf('node_modules/') === -1;
        // Extract a module name based on the filename
        if (parsedFrame.filename) {
            parsedFrame.module = getModule(parsedFrame.filename);
            if (!isInternal && linesOfContext > 0 && filesToRead.indexOf(parsedFrame.filename) === -1) {
                filesToRead.push(parsedFrame.filename);
            }
        }
        return parsedFrame;
    });
    // We do an early return if we do not want to fetch context liens
    if (linesOfContext <= 0) {
        return SyncPromise.resolve(frames);
    }
    try {
        return addPrePostContext(filesToRead, frames, linesOfContext);
    }
    catch (_) {
        // This happens in electron for example where we are not able to read files from asar.
        // So it's fine, we recover be just returning all frames without pre/post context.
        return SyncPromise.resolve(frames);
    }
}
/**
 * This function tries to read the source files + adding pre and post context (source code)
 * to a frame.
 * @param filesToRead string[] of filepaths
 * @param frames StackFrame[] containg all frames
 */
function addPrePostContext(filesToRead, frames, linesOfContext) {
    return new SyncPromise(function (resolve) {
        return readSourceFiles(filesToRead).then(function (sourceFiles) {
            var result = frames.map(function (frame) {
                if (frame.filename && sourceFiles[frame.filename]) {
                    try {
                        var lines = sourceFiles[frame.filename].split('\n');
                        addContextToFrame(lines, frame, linesOfContext);
                    }
                    catch (e) {
                        // anomaly, being defensive in case
                        // unlikely to ever happen in practice but can definitely happen in theory
                    }
                }
                return frame;
            });
            resolve(result);
        });
    });
}
/**
 * @hidden
 */
export function getExceptionFromError(error, options) {
    var name = error.name || error.constructor.name;
    var stack = extractStackFromError(error);
    return new SyncPromise(function (resolve) {
        return parseStack(stack, options).then(function (frames) {
            var result = {
                stacktrace: {
                    frames: prepareFramesForEvent(frames),
                },
                type: name,
                value: error.message,
            };
            resolve(result);
        });
    });
}
/**
 * @hidden
 */
export function parseError(error, options) {
    return new SyncPromise(function (resolve) {
        return getExceptionFromError(error, options).then(function (exception) {
            resolve({
                exception: {
                    values: [exception],
                },
            });
        });
    });
}
/**
 * @hidden
 */
export function prepareFramesForEvent(stack) {
    if (!stack || !stack.length) {
        return [];
    }
    var localStack = stack;
    var firstFrameFunction = localStack[0].function || '';
    if (firstFrameFunction.indexOf('captureMessage') !== -1 || firstFrameFunction.indexOf('captureException') !== -1) {
        localStack = localStack.slice(1);
    }
    // The frame where the crash happened, should be the last entry in the array
    return localStack.reverse();
}
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