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import { GetHeaders } from "./GetHeaders";
import { Errors } from "../../Errors";
import { mhaStrings } from "../../mhaStrings";
import { ParentFrame } from "../../ParentFrame";
/*
* GetHeadersEWS.js
*
* This file has all the methods to get PR_TRANSPORT_MESSAGE_HEADERS
* from the current message via EWS.
*
* Requirement Sets and Permissions
* makeEwsRequestAsync requires 1.0 and ReadWriteMailbox
*/
interface HeaderProp {
prop: string;
responseCode: string;
}
export class GetHeadersEWS {
public static extractHeadersFromXml(xml: string): HeaderProp {
// This filters nodes for the one that matches the given name.
function filterNode(xmlResponse: JQuery<XMLDocument>, node: string): string {
const response: JQuery<HTMLElement> = xmlResponse.find("*").filter(function (): boolean {
return this.nodeName === node;
});
if (response[0] && response[0].textContent) {
return response[0].textContent.replace(/\r\n|\r|\n/g, "\n");
}
return "";
}
const ret = {} as HeaderProp;
try {
// Strip encoded embedded null characters from our XML. parseXML doesn't like them.
xml = xml.replace(/�/g, "");
const response = $.parseXML(xml);
const responseDom = $(response);
if (responseDom) {
// We can do this because we know there's only the one property.
const extendedProperty = filterNode(responseDom, "t:ExtendedProperty");
if (extendedProperty.length > 0) {
ret.prop = filterNode(responseDom, "t:ExtendedProperty");
}
}
if (!ret.prop) {
ret.responseCode = filterNode(responseDom, "m:ResponseCode");
}
} catch {
// Exceptions thrown from parseXML are super chatty and we do not want to log them.
// We throw this exception away and just return nothing.
}
return ret;
}
private static stripHeaderFromXml(xml: string): string {
Iif (!xml) return "";
return xml
.replace(/<t:Value>[\s\S]*<\/t:Value>/g, "<t:Value>redacted</t:Value>")
.replace(/<t:ItemId.*?\/>/g, "<t:ItemId ID=\"redacted\"/>");
}
// Function called when the EWS request is complete.
private static callbackEws(asyncResult: Office.AsyncResult<string>): string {
try {
// Process the returned response here.
let header = null;
Iif (asyncResult.value) {
header = GetHeadersEWS.extractHeadersFromXml(asyncResult.value);
// We might not have a prop and also no error. This is OK if the prop is just missing.
Iif (!header.prop) {
Iif (header.responseCode === "NoError") {
ParentFrame.showError(null, mhaStrings.mhaHeadersMissing, true);
return "";
}
}
}
if (header && header.prop) {
return header.prop;
}
else {
throw new Error(mhaStrings.mhaRequestFailed);
}
}
catch (e) {
Iif (asyncResult) {
Errors.log(asyncResult.error, "Async Response\n" + GetHeadersEWS.stripHeaderFromXml(JSON.stringify(asyncResult, null, 2)));
}
ParentFrame.showError(e, "EWS callback failed");
}
return "";
}
private static getSoapEnvelope(request: string): string {
// Wrap an Exchange Web Services request in a SOAP envelope.
return "<?xml version='1.0' encoding='utf-8'?>" +
"<soap:Envelope xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'" +
" xmlns:t='http://schemas.microsoft.com/exchange/services/2006/types'>" +
" <soap:Header>" +
" <t:RequestServerVersion Version='Exchange2013'/>" +
" </soap:Header>" +
" <soap:Body>" +
request +
" </soap:Body>" +
"</soap:Envelope>";
}
private static getHeadersRequest(id: string): string {
// Return a GetItem EWS operation request for the headers of the specified item.
return "<GetItem xmlns='http://schemas.microsoft.com/exchange/services/2006/messages'>" +
" <ItemShape>" +
" <t:BaseShape>IdOnly</t:BaseShape>" +
" <t:BodyType>Text</t:BodyType>" +
" <t:AdditionalProperties>" +
// PR_TRANSPORT_MESSAGE_HEADERS
" <t:ExtendedFieldURI PropertyTag='0x007D' PropertyType='String' />" +
" </t:AdditionalProperties>" +
" </ItemShape>" +
" <ItemIds><t:ItemId Id='" + id + "'/></ItemIds>" +
"</GetItem>";
}
private static async makeEwsRequest(mailbox: Office.Mailbox, envelope:string): Promise<string> {
return new Promise((resolve) => {
mailbox.makeEwsRequestAsync(envelope, function (asyncResult: Office.AsyncResult<string>) {
resolve(GetHeadersEWS.callbackEws(asyncResult));
});
});
}
public static async send(): Promise<string> {
Iif (!GetHeaders.validItem()) {
Errors.logMessage("No item selected (EWS)");
return "";
}
try {
ParentFrame.updateStatus(mhaStrings.mhaRequestSent);
const mailbox = Office.context.mailbox;
Iif (mailbox && mailbox.item) {
const request = GetHeadersEWS.getHeadersRequest(mailbox.item.itemId);
const envelope = GetHeadersEWS.getSoapEnvelope(request);
const headers = await GetHeadersEWS.makeEwsRequest(mailbox, envelope);
return headers;
}
} catch (e2) {
ParentFrame.showError(e2, mhaStrings.mhaRequestFailed);
}
return "";
}
}
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