Document parseDate

salesforce · Apr 12, 2024 · b95d4c9 · b95d4c9
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diff --git a/api/.gitignore b/api/.gitignore
@@ -3,6 +3,7 @@ docs/*.md
 
 # subsequent PRs will un-ignore areas that are under review until
 # all docs are complete and we can drop this ignore file entirely
+!docs/tough-cookie.parsedate.md
 !docs/tough-cookie.formatdate.md
 !docs/tough-cookie.domainmatch.md
 !docs/tough-cookie.defaultpath.md

diff --git a/api/docs/tough-cookie.parsedate.md b/api/docs/tough-cookie.parsedate.md
@@ -0,0 +1,122 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [tough-cookie](./tough-cookie.md) &gt; [parseDate](./tough-cookie.parsedate.md)
+
+## parseDate() function
+
+Parse a cookie date string into a [Date](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date)<!-- -->. Parses according to [RFC6265 - Section 5.1.1](https://www.rfc-editor.org/rfc/rfc6265.html#section-5.1.1)<!-- -->, not [Date.parse()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse)<!-- -->.
+
+**Signature:**
+
+```typescript
+export declare function parseDate(cookieDate: Nullable<string>): Date | undefined;
+```
+
+## Parameters
+
+<table><thead><tr><th>
+
+Parameter
+
+
+</th><th>
+
+Type
+
+
+</th><th>
+
+Description
+
+
+</th></tr></thead>
+<tbody><tr><td>
+
+cookieDate
+
+
+</td><td>
+
+Nullable&lt;string&gt;
+
+
+</td><td>
+
+the cookie date string
+
+
+</td></tr>
+</tbody></table>
+**Returns:**
+
+Date \| undefined
+
+## Remarks
+
+\#\#\# RFC6265 - 5.1.1. Dates
+
+The user agent MUST use an algorithm equivalent to the following algorithm to parse a cookie-date. Note that the various boolean flags defined as a part of the algorithm (i.e., found-time, found- day-of-month, found-month, found-year) are initially "not set".
+
+1. Using the grammar below, divide the cookie-date into date-tokens.
+
+```
+    cookie-date     = *delimiter date-token-list *delimiter
+    date-token-list = date-token *( 1*delimiter date-token )
+    date-token      = 1*non-delimiter
+
+    delimiter       = %x09 / %x20-2F / %x3B-40 / %x5B-60 / %x7B-7E
+    non-delimiter   = %x00-08 / %x0A-1F / DIGIT / ":" / ALPHA / %x7F-FF
+    non-digit       = %x00-2F / %x3A-FF
+
+    day-of-month    = 1*2DIGIT ( non-digit *OCTET )
+    month           = ( "jan" / "feb" / "mar" / "apr" /
+                       "may" / "jun" / "jul" / "aug" /
+                       "sep" / "oct" / "nov" / "dec" ) *OCTET
+    year            = 2*4DIGIT ( non-digit *OCTET )
+    time            = hms-time ( non-digit *OCTET )
+    hms-time        = time-field ":" time-field ":" time-field
+    time-field      = 1*2DIGIT
+```
+2. Process each date-token sequentially in the order the date-tokens appear in the cookie-date:
+
+1. If the found-time flag is not set and the token matches the time production, set the found-time flag and set the hour- value, minute-value, and second-value to the numbers denoted by the digits in the date-token, respectively. Skip the remaining sub-steps and continue to the next date-token.
+
+2. If the found-day-of-month flag is not set and the date-token matches the day-of-month production, set the found-day-of- month flag and set the day-of-month-value to the number denoted by the date-token. Skip the remaining sub-steps and continue to the next date-token.
+
+3. If the found-month flag is not set and the date-token matches the month production, set the found-month flag and set the month-value to the month denoted by the date-token. Skip the remaining sub-steps and continue to the next date-token.
+
+4. If the found-year flag is not set and the date-token matches the year production, set the found-year flag and set the year-value to the number denoted by the date-token. Skip the remaining sub-steps and continue to the next date-token.
+
+3. If the year-value is greater than or equal to 70 and less than or equal to 99, increment the year-value by 1900.
+
+4. If the year-value is greater than or equal to 0 and less than or equal to 69, increment the year-value by 2000.
+
+1. NOTE: Some existing user agents interpret two-digit years differently.
+
+5. Abort these steps and fail to parse the cookie-date if:
+
+- at least one of the found-day-of-month, found-month, found- year, or found-time flags is not set,
+
+- the day-of-month-value is less than 1 or greater than 31,
+
+- the year-value is less than 1601,
+
+- the hour-value is greater than 23,
+
+- the minute-value is greater than 59, or
+
+- the second-value is greater than 59.
+
+(Note that leap seconds cannot be represented in this syntax.)
+
+6. Let the parsed-cookie-date be the date whose day-of-month, month, year, hour, minute, and second (in UTC) are the day-of-month- value, the month-value, the year-value, the hour-value, the minute-value, and the second-value, respectively. If no such date exists, abort these steps and fail to parse the cookie-date.
+
+7. Return the parsed-cookie-date as the result of this algorithm.
+
+## Example
+
+
+```
+parseDate('Wed, 09 Jun 2021 10:18:14 GMT')
+```
+
diff --git a/api/tough-cookie.api.md b/api/tough-cookie.api.md
@@ -272,8 +272,8 @@ export const parse: (str: string, options?: {
     loose?: boolean | undefined;
 } | undefined) => Cookie | undefined;
 
-// @public (undocumented)
-export function parseDate(str: Nullable<string>): Date | undefined;
+// @public
+export function parseDate(cookieDate: Nullable<string>): Date | undefined;
 
 // @public
 export function pathMatch(reqPath: string, cookiePath: string): boolean;

diff --git a/lib/cookie/parseDate.ts b/lib/cookie/parseDate.ts
@@ -123,19 +123,117 @@ function parseMonth(token: string): number | undefined {
   }
 }
 
-/*
- * RFC6265 S5.1.1 date parser (see RFC for full grammar)
+/**
+ * Parse a cookie date string into a {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date | Date}. Parses according to
+ * {@link https://www.rfc-editor.org/rfc/rfc6265.html#section-5.1.1 | RFC6265 - Section 5.1.1}, not
+ * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse | Date.parse()}.
+ *
+ * @remarks
+ *
+ * ### RFC6265 - 5.1.1. Dates
+ *
+ * The user agent MUST use an algorithm equivalent to the following
+ * algorithm to parse a cookie-date.  Note that the various boolean
+ * flags defined as a part of the algorithm (i.e., found-time, found-
+ * day-of-month, found-month, found-year) are initially "not set".
+ *
+ * 1.  Using the grammar below, divide the cookie-date into date-tokens.
+ *
+ * ```
+ *     cookie-date     = *delimiter date-token-list *delimiter
+ *     date-token-list = date-token *( 1*delimiter date-token )
+ *     date-token      = 1*non-delimiter
+ *
+ *     delimiter       = %x09 / %x20-2F / %x3B-40 / %x5B-60 / %x7B-7E
+ *     non-delimiter   = %x00-08 / %x0A-1F / DIGIT / ":" / ALPHA / %x7F-FF
+ *     non-digit       = %x00-2F / %x3A-FF
+ *
+ *     day-of-month    = 1*2DIGIT ( non-digit *OCTET )
+ *     month           = ( "jan" / "feb" / "mar" / "apr" /
+ *                        "may" / "jun" / "jul" / "aug" /
+ *                        "sep" / "oct" / "nov" / "dec" ) *OCTET
+ *     year            = 2*4DIGIT ( non-digit *OCTET )
+ *     time            = hms-time ( non-digit *OCTET )
+ *     hms-time        = time-field ":" time-field ":" time-field
+ *     time-field      = 1*2DIGIT
+ * ```
+ *
+ * 2. Process each date-token sequentially in the order the date-tokens
+ *     appear in the cookie-date:
+ *
+ *     1. If the found-time flag is not set and the token matches the
+ *         time production, set the found-time flag and set the hour-
+ *         value, minute-value, and second-value to the numbers denoted
+ *         by the digits in the date-token, respectively.  Skip the
+ *         remaining sub-steps and continue to the next date-token.
+ *
+ *     2. If the found-day-of-month flag is not set and the date-token
+ *         matches the day-of-month production, set the found-day-of-
+ *         month flag and set the day-of-month-value to the number
+ *         denoted by the date-token.  Skip the remaining sub-steps and
+ *         continue to the next date-token.
+ *
+ *     3. If the found-month flag is not set and the date-token matches
+ *         the month production, set the found-month flag and set the
+ *         month-value to the month denoted by the date-token.  Skip the
+ *         remaining sub-steps and continue to the next date-token.
+ *
+ *     4. If the found-year flag is not set and the date-token matches
+ *         the year production, set the found-year flag and set the
+ *         year-value to the number denoted by the date-token.  Skip the
+ *         remaining sub-steps and continue to the next date-token.
+ *
+ *  3. If the year-value is greater than or equal to 70 and less than or
+ *      equal to 99, increment the year-value by 1900.
+ *
+ *  4. If the year-value is greater than or equal to 0 and less than or
+ *      equal to 69, increment the year-value by 2000.
+ *
+ *      1. NOTE: Some existing user agents interpret two-digit years differently.
+ *
+ *  5. Abort these steps and fail to parse the cookie-date if:
+ *
+ *      - at least one of the found-day-of-month, found-month, found-
+ *          year, or found-time flags is not set,
+ *
+ *      - the day-of-month-value is less than 1 or greater than 31,
+ *
+ *      - the year-value is less than 1601,
+ *
+ *      - the hour-value is greater than 23,
+ *
+ *      - the minute-value is greater than 59, or
+ *
+ *      - the second-value is greater than 59.
+ *
+ *      (Note that leap seconds cannot be represented in this syntax.)
+ *
+ *  6. Let the parsed-cookie-date be the date whose day-of-month, month,
+ *      year, hour, minute, and second (in UTC) are the day-of-month-
+ *      value, the month-value, the year-value, the hour-value, the
+ *      minute-value, and the second-value, respectively.  If no such
+ *      date exists, abort these steps and fail to parse the cookie-date.
+ *
+ *  7. Return the parsed-cookie-date as the result of this algorithm.
+ *
+ * @example
+ * ```
+ * parseDate('Wed, 09 Jun 2021 10:18:14 GMT')
+ * ```
+ *
+ * @param cookieDate - the cookie date string
+ * @public
  */
-export function parseDate(str: Nullable<string>): Date | undefined {
-  if (!str) {
+export function parseDate(cookieDate: Nullable<string>): Date | undefined {
+  if (!cookieDate) {
     return
   }
 
   /* RFC6265 S5.1.1:
    * 2. Process each date-token sequentially in the order the date-tokens
    * appear in the cookie-date
    */
-  const tokens = str.split(DATE_DELIM)
+  const tokens = cookieDate.split(DATE_DELIM)
   if (!tokens) {
     return
   }