1.修改代码适配阿里云的服务器

server/vendor/go.mongodb.org/mongo-driver/v2/mongo/writeconcern/writeconcern.go

@@ -0,0 +1,132 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+// Package writeconcern defines write concerns for MongoDB operations.
+//
+// For more information about MongoDB write concerns, see
+// https://www.mongodb.com/docs/manual/reference/write-concern/
+package writeconcern
+
+// WCMajority can be used to create a WriteConcern with a W value of "majority".
+const WCMajority = "majority"
+
+// A WriteConcern defines a MongoDB write concern, which describes the level of acknowledgment
+// requested from MongoDB for write operations to a standalone mongod, to replica sets, or to
+// sharded clusters.
+//
+// For more information about MongoDB write concerns, see
+// https://www.mongodb.com/docs/manual/reference/write-concern/
+type WriteConcern struct {
+	// W requests acknowledgment that the write operation has propagated to a
+	// specified number of mongod instances or to mongod instances with
+	// specified tags. It sets the "w" option in a MongoDB write concern.
+	//
+	// W values must be a string or an int.
+	//
+	// Common values are:
+	//   - "majority": requests acknowledgment that write operations have been
+	//     durably committed to the calculated majority of the data-bearing
+	//     voting members.
+	//   - 1: requests acknowledgment that write operations have been written
+	//     to 1 node.
+	//   - 0: requests no acknowledgment of write operations
+	//
+	// For more information about the "w" option, see
+	// https://www.mongodb.com/docs/manual/reference/write-concern/#w-option
+	W any
+
+	// Journal requests acknowledgment from MongoDB that the write operation has
+	// been written to the on-disk journal. It sets the "j" option in a MongoDB
+	// write concern.
+	//
+	// For more information about the "j" option, see
+	// https://www.mongodb.com/docs/manual/reference/write-concern/#j-option
+	Journal *bool
+}
+
+// Unacknowledged returns a WriteConcern that requests no acknowledgment of
+// write operations.
+//
+// For more information about write concern "w: 0", see
+// https://www.mongodb.com/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-number-
+func Unacknowledged() *WriteConcern {
+	return &WriteConcern{W: 0}
+}
+
+// W1 returns a WriteConcern that requests acknowledgment that write operations
+// have been written to memory on one node (e.g. the standalone mongod or the
+// primary in a replica set).
+//
+// For more information about write concern "w: 1", see
+// https://www.mongodb.com/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-number-
+func W1() *WriteConcern {
+	return &WriteConcern{W: 1}
+}
+
+// Journaled returns a WriteConcern that requests acknowledgment that write
+// operations have been written to the on-disk journal on MongoDB.
+//
+// The database's default value for "w" determines how many nodes must write to
+// their on-disk journal before the write operation is acknowledged.
+//
+// For more information about write concern "j: true", see
+// https://www.mongodb.com/docs/manual/reference/write-concern/#mongodb-writeconcern-ournal
+func Journaled() *WriteConcern {
+	journal := true
+	return &WriteConcern{Journal: &journal}
+}
+
+// Majority returns a WriteConcern that requests acknowledgment that write
+// operations have been durably committed to the calculated majority of the
+// data-bearing voting members.
+//
+// Write concern "w: majority" typically requires write operations to be written
+// to the on-disk journal before they are acknowledged, unless journaling is
+// disabled on MongoDB or the "writeConcernMajorityJournalDefault" replica set
+// configuration is set to false.
+//
+// For more information about write concern "w: majority", see
+// https://www.mongodb.com/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-majority-
+func Majority() *WriteConcern {
+	return &WriteConcern{W: WCMajority}
+}
+
+// Custom returns a WriteConcern that requests acknowledgment that write
+// operations have propagated to tagged members that satisfy the custom write
+// concern defined in "settings.getLastErrorModes".
+//
+// For more information about custom write concern names, see
+// https://www.mongodb.com/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-custom-write-concern-name-
+func Custom(tag string) *WriteConcern {
+	return &WriteConcern{W: tag}
+}
+
+// Acknowledged indicates whether or not a write with the given write concern will be acknowledged.
+func (wc *WriteConcern) Acknowledged() bool {
+	// Only {w: 0} or {w: 0, j: false} are an unacknowledged write concerns. All other values are
+	// acknowledged.
+	return wc == nil || wc.W != 0 || (wc.Journal != nil && *wc.Journal)
+}
+
+// IsValid returns true if the WriteConcern is valid.
+func (wc *WriteConcern) IsValid() bool {
+	if wc == nil {
+		return true
+	}
+
+	switch w := wc.W.(type) {
+	case int:
+		// A write concern with {w: int} must have a non-negative value and
+		// cannot have the combination {w: 0, j: true}.
+		return w >= 0 && (w > 0 || wc.Journal == nil || !*wc.Journal)
+	case string, nil:
+		// A write concern with {w: string} or no w specified is always valid.
+		return true
+	default:
+		// A write concern with an unsupported w type is not valid.
+		return false
+	}
+}