Check-in rlz code to src\rlz from http://code.google.com/p/rlz/.

rlz/lib/rlz_lib.h

Index: rlz/lib/rlz_lib.h
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--- rlz/lib/rlz_lib.h	(revision 0)
+++ rlz/lib/rlz_lib.h	(revision 0)
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// A library to manage RLZ information for access-points shared
+// across different client applications.
+//
+// All functions return true on success and false on error.
+// This implemenation is thread safe.
+
+
+#ifndef RLZ_LIB_RLZ_LIB_H_
+#define RLZ_LIB_RLZ_LIB_H_
+
+#include <stdio.h>
+#include <string>
+
+#include "build/build_config.h"
+
+#include "rlz/lib/rlz_enums.h"
+
+#if defined(OS_WIN)
+#define RLZ_LIB_API __cdecl
+#else
+#define RLZ_LIB_API
+#endif
+
+// Define one of
+// + RLZ_NETWORK_IMPLEMENTATION_WIN_INET: Uses win inet to send financial pings.
+// + RLZ_NETWORK_IMPLEMENTATION_CHROME_NET: Uses chrome's network stack to send
+//   financial pings. rlz_lib::SetURLRequestContext() must be called before
+//   any calls to SendFinancialPing().
+#if defined(RLZ_NETWORK_IMPLEMENTATION_WIN_INET) && \
+    defined(RLZ_NETWORK_IMPLEMENTATION_CHROME_NET)
+#error Exactly one of RLZ_NETWORK_IMPLEMENTATION_WIN_INET and \
+    RLZ_NETWORK_IMPLEMENTATION_CHROME_NET should be defined.
+#endif
+#if !defined(RLZ_NETWORK_IMPLEMENTATION_WIN_INET) && \
+    !defined(RLZ_NETWORK_IMPLEMENTATION_CHROME_NET)
+#if defined(OS_WIN)
+#define RLZ_NETWORK_IMPLEMENTATION_WIN_INET
+#else
+#define RLZ_NETWORK_IMPLEMENTATION_CHROME_NET
+#endif
+#endif
+
+#if defined(RLZ_NETWORK_IMPLEMENTATION_CHROME_NET)
+namespace net {
+class URLRequestContextGetter;
+}  // namespace net
+#endif
+
+namespace rlz_lib {
+
+class ScopedRlzValueStoreLock;
+
+// The maximum length of an access points RLZ in bytes.
+const int kMaxRlzLength = 64;
+// The maximum length of an access points RLZ in bytes.
+const int kMaxDccLength = 128;
+// The maximum length of a CGI string in bytes.
+const int kMaxCgiLength = 2048;
+// The maximum length of a ping response we will parse in bytes. If the response
+// is bigger, please break it up into separate calls.
+const int kMaxPingResponseLength = 0x4000;  // 16K
+
+#if defined(RLZ_NETWORK_IMPLEMENTATION_CHROME_NET)
+// Set the URLRequestContextGetter used by SendFinancialPing(). The IO message
+// loop returned by this context will be used for the IO done by
+// SendFinancialPing().
+bool RLZ_LIB_API SetURLRequestContext(net::URLRequestContextGetter* context);
+#endif
+
+// RLZ storage functions.
+
+// Get all the events reported by this product as a CGI string to append to
+// the daily ping.
+// Access: HKCU read.
+bool RLZ_LIB_API GetProductEventsAsCgi(Product product, char* unescaped_cgi,
+                                       size_t unescaped_cgi_size);
+
+// Records an RLZ event.
+// Some events can be product-independent (e.g: First search from home page),
+// and some can be access point independent (e.g. Pack installed). However,
+// product independent events must still include the product which cares about
+// that information being reported.
+// Access: HKCU write.
+bool RLZ_LIB_API RecordProductEvent(Product product, AccessPoint point,
+                                    Event event_id);
+
+// Clear an event reported by this product. This should be called after a
+// successful ping to the RLZ server.
+// Access: HKCU write.
+bool RLZ_LIB_API ClearProductEvent(Product product, AccessPoint point,
+                                   Event event_id);
+
+// Clear all reported events and recorded stateful events of this product.
+// This should be called on complete uninstallation of the product.
+// Access: HKCU write.
+bool RLZ_LIB_API ClearAllProductEvents(Product product);
+
+// Clears all product-specifc state from the RLZ registry.
+// Should be called during product uninstallation.
+// This removes outstanding product events, product financial ping times,
+// the product RLS argument (if any), and any RLZ's for access points being
+// uninstalled with the product.
+// access_points is an array terminated with NO_ACCESS_POINT.
+// IMPORTANT: These are the access_points the product is removing as part
+// of the uninstallation, not necessarily all the access points passed to
+// SendFinancialPing() and GetPingParams().
+// access_points can be NULL if no points are being uninstalled.
+// No return value - this is best effort. Will assert in debug mode on
+// failed attempts.
+// Access: HKCU write.
+void RLZ_LIB_API ClearProductState(Product product,
+                                   const AccessPoint* access_points);
+
+// Get the RLZ value of the access point. If the access point is not Google, the
+// RLZ will be the empty string and the function will return false.
+// Access: HKCU read.
+bool RLZ_LIB_API GetAccessPointRlz(AccessPoint point, char* rlz,
+                                   size_t rlz_size);
+
+// Set the RLZ for the access-point. Fails and asserts if called when the access
+// point is not set to Google.
+// new_rlz should come from a server-response. Client applications should not
+// create their own RLZ values.
+// Access: HKCU write.
+bool RLZ_LIB_API SetAccessPointRlz(AccessPoint point, const char* new_rlz);
+
+// Financial Server pinging functions.
+// These functions deal with pinging the RLZ financial server and parsing and
+// acting upon the response. Clients should SendFinancialPing() to avoid needing
+// these functions. However, these functions allow clients to split the various
+// parts of the pinging process up as needed (to avoid firewalls, etc).
+
+// Forms the HTTP request to send to the RLZ financial server.
+//
+// product            : The product to ping for.
+// access_points      : The access points this product affects. Array must be
+//                      terminated with NO_ACCESS_POINT.
+// product_signature  : The signature sent with daily pings (e.g. swg, ietb)
+// product_brand      : The brand of the pinging product, if any.
+// product_id         : The product-specific installation ID (can be NULL).
+// product_lang       : The language for the product (used to determine cohort).
+// exclude_machine_id : Whether the Machine ID should be explicitly excluded
+//                      based on the products privacy policy.
+// request            : The buffer where the function returns the HTTP request.
+// request_buffer_size: The size of the request buffer in bytes. The buffer
+//                      size (kMaxCgiLength+1) is guaranteed to be enough.
+//
+// Access: HKCU read.
+bool RLZ_LIB_API FormFinancialPingRequest(Product product,
+                                          const AccessPoint* access_points,
+                                          const char* product_signature,
+                                          const char* product_brand,
+                                          const char* product_id,
+                                          const char* product_lang,
+                                          bool exclude_machine_id,
+                                          char* request,
+                                          size_t request_buffer_size);
+
+// Pings the financial server and returns the HTTP response. This will fail
+// if it is too early to ping the server since the last ping.
+//
+// If RLZ_NETWORK_IMPLEMENTATION_CHROME_NET is set, SetURLRequestContext() needs
+// to be called before calling this function.
+//
+// product              : The product to ping for.
+// request              : The HTTP request (for example, returned by
+//                        FormFinancialPingRequest).
+// response             : The buffer in which the HTTP response is returned.
+// response_buffer_size : The size of the response buffer in bytes. The buffer
+//                        size (kMaxPingResponseLength+1) is enough for all
+//                        legitimate server responses (any response that is
+//                        bigger should be considered the same way as a general
+//                        network problem).
+//
+// Access: HKCU read.
+bool RLZ_LIB_API PingFinancialServer(Product product,
+                                     const char* request,
+                                     char* response,
+                                     size_t response_buffer_size);
+
+// Checks if a ping response is valid - ie. it has a checksum line which
+// is the CRC-32 checksum of the message uptil the checksum. If
+// checksum_idx is not NULL, it will get the index of the checksum, i.e. -
+// the effective end of the message.
+// Access: No restrictions.
+bool RLZ_LIB_API IsPingResponseValid(const char* response,
+                                     int* checksum_idx);
+
+
+// Complex helpers built on top of other functions.
+
+// Parses the responses from the financial server and updates product state
+// and access point RLZ's in registry. Like ParsePingResponse(), but also
+// updates the last ping time.
+// Access: HKCU write.
+bool RLZ_LIB_API ParseFinancialPingResponse(Product product,
+                                            const char* response);
+
+// Send the ping with RLZs and events to the PSO server.
+// This ping method should be called daily. (More frequent calls will fail).
+// Also, if there are no events, the call will succeed only once a week.
+//
+// If RLZ_NETWORK_IMPLEMENTATION_CHROME_NET is set, SetURLRequestContext() needs
+// to be called before calling this function.
+//
+// product            : The product to ping for.
+// access_points      : The access points this product affects. Array must be
+//                      terminated with NO_ACCESS_POINT.
+// product_signature  : The signature sent with daily pings (e.g. swg, ietb)
+// product_brand      : The brand of the pinging product, if any.
+// product_id         : The product-specific installation ID (can be NULL).
+// product_lang       : The language for the product (used to determine cohort).
+// exclude_machine_id : Whether the Machine ID should be explicitly excluded
+//                      based on the products privacy policy.
+//
+// Returns true on successful ping and response, false otherwise.
+// Access: HKCU write.
+bool RLZ_LIB_API SendFinancialPing(Product product,
+                                   const AccessPoint* access_points,
+                                   const char* product_signature,
+                                   const char* product_brand,
+                                   const char* product_id,
+                                   const char* product_lang,
+                                   bool exclude_machine_id);
+
+// An alternate implementations of SendFinancialPing with the same behavior,
+// except the caller can optionally choose to skip the timing check.
+bool RLZ_LIB_API SendFinancialPing(Product product,
+                                   const AccessPoint* access_points,
+                                   const char* product_signature,
+                                   const char* product_brand,
+                                   const char* product_id,
+                                   const char* product_lang,
+                                   bool exclude_machine_id,
+                                   const bool skip_time_check);
+
+// Parses RLZ related ping response information from the server.
+// Updates stored RLZ values and clears stored events accordingly.
+// Access: HKCU write.
+bool RLZ_LIB_API ParsePingResponse(Product product, const char* response);
+
+
+// Copies the events associated with the product and the RLZ's for each access
+// point in access_points into cgi. This string can be directly appended
+// to a ping (will need an & if not first paramter).
+// access_points must be an array of AccessPoints terminated with
+// NO_ACCESS_POINT.
+// Access: HKCU read.
+bool RLZ_LIB_API GetPingParams(Product product,
+                               const AccessPoint* access_points,
+                               char* unescaped_cgi, size_t unescaped_cgi_size);
+
+#if defined(OS_WIN)
+// OEM Deal confirmation storage functions. OEM Deals are windows-only.
+
+// Makes the OEM Deal Confirmation code writable by all users on the machine.
+// This should be called before calling SetMachineDealCode from a non-admin
+// account.
+// Access: HKLM write.
+bool RLZ_LIB_API CreateMachineState(void);
+
+// Set the OEM Deal Confirmation Code (DCC). This information is used for RLZ
+// initalization.
+// Access: HKLM write, or
+// HKCU read if rlz_lib::CreateMachineState() has been sucessfully called.
+bool RLZ_LIB_API SetMachineDealCode(const char* dcc);
+
+// Get the DCC cgi argument string to append to a daily ping.
+// Should be used only by OEM deal trackers. Applications should use the
+// GetMachineDealCode method which has an AccessPoint paramter.
+// Access: HKLM read.
+bool RLZ_LIB_API GetMachineDealCodeAsCgi(char* cgi, size_t cgi_size);
+
+// Get the DCC value stored in registry.
+// Should be used only by OEM deal trackers. Applications should use the
+// GetMachineDealCode method which has an AccessPoint paramter.
+// Access: HKLM read.
+bool RLZ_LIB_API GetMachineDealCode(char* dcc, size_t dcc_size);
+
+// Parses a ping response, checks if it is valid and sets the machine DCC
+// from the response. The ping must also contain the current DCC value in
+// order to be considered valid.
+// Access: HKLM write;
+//         HKCU write if CreateMachineState() has been successfully called.
+bool RLZ_LIB_API SetMachineDealCodeFromPingResponse(const char* response);
+
+#endif
+
+// Segment RLZ persistence based on branding information.
+// All information for a given product is persisted under keys with the either
+// product's name or its access point's name.  This assumes that only
+// one instance of the product is installed on the machine, and that only one
+// product brand is associated with it.
+//
+// In some cases, a given product may be using supplementary brands.  The RLZ
+// information must be kept separately for each of these brands.  To achieve
+// this segmentation, scope all RLZ library calls that deal with supplementary
+// brands within the lifetime of an rlz_lib::ProductBranding instance.
+//
+// For example, to record events for a supplementary brand, do the following:
+//
+//  {
+//    rlz_lib::SupplementaryBranding branding("AAAA");
+//    // This call to RecordProductEvent is scoped to the AAAA brand.
+//    rlz_lib::RecordProductEvent(rlz_lib::DESKTOP, rlz_lib::GD_DESKBAND,
+//                                rlz_lib::INSTALL);
+//  }
+//
+//  // This call to RecordProductEvent is not scoped to any supplementary brand.
+//  rlz_lib::RecordProductEvent(rlz_lib::DESKTOP, rlz_lib::GD_DESKBAND,
+//                              rlz_lib::INSTALL);
+//
+// In particular, this affects the recording of stateful events and the sending
+// of financial pings.  In the former case, a stateful event recorded while
+// scoped to a supplementary brand will be recorded again when scoped to a
+// different supplementary brand (or not scoped at all).  In the latter case,
+// the time skip check is specific to each supplementary brand.
+class SupplementaryBranding {
+ public:
+  SupplementaryBranding(const char* brand);
+  ~SupplementaryBranding();
+
+  static const std::string& GetBrand();
+
+ private:
+  ScopedRlzValueStoreLock* lock_;
+};
+
+}  // namespace rlz_lib
+
+#endif  // RLZ_LIB_RLZ_LIB_H_