diff --git a/Make.inc b/Make.inc
index 3f1fb6451d210..df2e522cad09f 100644
--- a/Make.inc
+++ b/Make.inc
@@ -49,6 +49,7 @@ USE_SYSTEM_LIBUV:=0
 USE_SYSTEM_UTF8PROC:=0
 USE_SYSTEM_MBEDTLS:=0
 USE_SYSTEM_LIBSSH2:=0
+USE_SYSTEM_NGHTTP2:=0
 USE_SYSTEM_CURL:=0
 USE_SYSTEM_LIBGIT2:=0
 USE_SYSTEM_PATCHELF:=0
@@ -1099,7 +1100,7 @@ USE_BINARYBUILDER ?= 0
 endif
 
 # This is the set of projects that BinaryBuilder dependencies are hooked up for.
-BB_PROJECTS := OPENBLAS LLVM SUITESPARSE OPENLIBM GMP MBEDTLS LIBSSH2 MPFR CURL LIBGIT2 PCRE LIBUV LIBUNWIND DSFMT OBJCONV ZLIB P7ZIP
+BB_PROJECTS := OPENBLAS LLVM SUITESPARSE OPENLIBM GMP MBEDTLS LIBSSH2 NGHTTP2 MPFR CURL LIBGIT2 PCRE LIBUV LIBUNWIND DSFMT OBJCONV ZLIB P7ZIP
 define SET_BB_DEFAULT
 # First, check to see if BB is disabled on a global setting
 ifeq ($$(USE_BINARYBUILDER),0)
diff --git a/Makefile b/Makefile
index 70ef329b4260d..30dfac383bed8 100644
--- a/Makefile
+++ b/Makefile
@@ -170,6 +170,7 @@ JL_PRIVATE_LIBS-$(USE_SYSTEM_DSFMT) += libdSFMT
 JL_PRIVATE_LIBS-$(USE_SYSTEM_GMP) += libgmp
 JL_PRIVATE_LIBS-$(USE_SYSTEM_MPFR) += libmpfr
 JL_PRIVATE_LIBS-$(USE_SYSTEM_LIBSSH2) += libssh2
+JL_PRIVATE_LIBS-$(USE_SYSTEM_NGHTTP2) += libnghttp2
 JL_PRIVATE_LIBS-$(USE_SYSTEM_MBEDTLS) += libmbedtls libmbedcrypto libmbedx509
 JL_PRIVATE_LIBS-$(USE_SYSTEM_CURL) += libcurl
 JL_PRIVATE_LIBS-$(USE_SYSTEM_LIBGIT2) += libgit2
diff --git a/NEWS.md b/NEWS.md
index 9942996ef4633..6f884d2fc2fa6 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -58,8 +58,9 @@ Build system changes
 
 Library functions
 -----------------
-* The `Base.Grisu` code has been officially removed (float printing was switched to the ryu algorithm code in 1.4)
 
+* The `Base.download` function has been deprecated (silently, by default) in favor of the new `Downloads.download` standard library function ([#37340]).
+* The `Base.Grisu` code has been officially removed (float printing was switched to the ryu algorithm code in 1.4)
 
 New library functions
 ---------------------
@@ -81,6 +82,7 @@ New library features
 
 Standard library changes
 ------------------------
+
 * The `nextprod` function now accepts tuples and other array types for its first argument ([#35791]).
 * The `reverse(A; dims)` function for multidimensional `A` can now reverse multiple dimensions at once
   by passing a tuple for `dims`, and defaults to reversing all dimensions; there is also a multidimensional
@@ -99,6 +101,7 @@ Standard library changes
 * `RegexMatch` objects can now be probed for whether a named capture group exists within it through `haskey()` ([#36717]).
 * For consistency `haskey(r::RegexMatch, i::Integer)` has also been added and returns if the capture group for `i` exists ([#37300]).
 * A new standard library `TOML` has been added for parsing and printing [TOML files](https://toml.io) ([#37034]).
+* A new standard library `Downloads` has been added, which replaces the old `Base.download` function with `Downloads.download`, providing cross-platform, multi-protocol, in-process download functionality implemented with [libcurl](https://curl.haxx.se/libcurl/) ([#37340]).
 * The `Pkg.BinaryPlatforms` module has been moved into `Base` as `Base.BinaryPlatforms` and heavily reworked.
   Applications that want to be compatible with the old API should continue to import `Pkg.BinaryPlatforms`,
   however new users should use `Base.BinaryPlatforms` directly. ([#37320])
@@ -107,6 +110,7 @@ Standard library changes
   all of `Pkg` alongside. ([#37320])
 
 #### LinearAlgebra
+
 * New method `LinearAlgebra.issuccess(::CholeskyPivoted)` for checking whether pivoted Cholesky factorization was successful ([#36002]).
 * `UniformScaling` can now be indexed into using ranges to return dense matrices and vectors ([#24359]).
 * New function `LinearAlgebra.BLAS.get_num_threads()` for getting the number of BLAS threads. ([#36360])
diff --git a/base/download.jl b/base/download.jl
index 0b9c6ba519a8b..60f4823c7a4e8 100644
--- a/base/download.jl
+++ b/base/download.jl
@@ -1,51 +1,5 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-# file downloading
-
-if Sys.iswindows()
-    function download_powershell(url::AbstractString, filename::AbstractString)
-        ps = joinpath(get(ENV, "SYSTEMROOT", "C:\\Windows"), "System32\\WindowsPowerShell\\v1.0\\powershell.exe")
-        tls12 = "[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12"
-        client = "New-Object System.Net.Webclient"
-        # in the following we escape ' with '' (see https://ss64.com/ps/syntax-esc.html)
-        downloadfile = "($client).DownloadFile('$(replace(url, "'" => "''"))', '$(replace(filename, "'" => "''"))')"
-        # PowerShell v3 or later is required for Tls12
-        proc = run(pipeline(`$ps -Version 3 -NoProfile -Command "$tls12; $downloadfile"`; stderr=stderr); wait=false)
-        if !success(proc)
-            if proc.exitcode % Int32 == -393216
-                # appears to be "wrong version" exit code, based on
-                # https://docs.microsoft.com/en-us/azure/cloud-services/cloud-services-startup-tasks-common
-                @error "Downloading files requires Windows Management Framework 3.0 or later."
-            end
-            pipeline_error(proc)
-        end
-        return filename
-    end
-end
-
-function find_curl()
-    if Sys.isapple() && Sys.isexecutable("/usr/bin/curl")
-        "/usr/bin/curl"
-    elseif Sys.iswindows() && Sys.isexecutable(joinpath(get(ENV, "SYSTEMROOT", "C:\\Windows"), "System32\\curl.exe"))
-        joinpath(get(ENV, "SYSTEMROOT", "C:\\Windows"), "System32\\curl.exe")
-    elseif !Sys.iswindows() && Sys.which("curl") !== nothing
-        "curl"
-    else
-        nothing
-    end
-end
-
-function download_curl(curl_exe::AbstractString, url::AbstractString, filename::AbstractString)
-    err = PipeBuffer()
-    process = run(pipeline(`$curl_exe -s -S -g -L -f -o $filename $url`, stderr=err), wait=false)
-    if !success(process)
-        error_msg = readline(err)
-        @error "Download failed: $error_msg"
-        pipeline_error(process)
-    end
-    return filename
-end
-
 const DOWNLOAD_HOOKS = Callable[]
 
 function download_url(url::AbstractString)
@@ -55,50 +9,25 @@ function download_url(url::AbstractString)
     return url
 end
 
-function download(url::AbstractString, filename::AbstractString)
-    url = download_url(url)
-    curl_exe = find_curl()
-    if curl_exe !== nothing
-        return download_curl(curl_exe, url, filename)
-    elseif Sys.iswindows()
-        return download_powershell(url, filename)
-    elseif Sys.which("wget") !== nothing
-        try
-            run(`wget -O $filename $url`)
-        catch
-            rm(filename, force=true)  # wget always creates a file
-            rethrow()
-        end
-    elseif Sys.which("busybox") !== nothing
-        try
-            run(`busybox wget -O $filename $url`)
-        catch
-            rm(filename, force=true)  # wget always creates a file
-            rethrow()
-        end
-    elseif Sys.which("fetch") !== nothing
-        run(`fetch -f $filename $url`)
-    else
-        error("No download agent available; install curl, wget, busybox or fetch.")
-    end
-    return filename
-end
-
-function download(url::AbstractString)
-    filename = tempname()
-    download(url, filename)
-end
+Downloads() = require(PkgId(
+        UUID((0xf43a241f_c20a_4ad4, 0x852c_f6b1247861c6)),
+        "Downloads",
+    ))
 
 """
-    download(url::AbstractString, [localfile::AbstractString])
+    download(url::AbstractString, [path::AbstractString = tempname()]) -> path
 
-Download a file from the given url, optionally renaming it to the given local file name. If
-no filename is given this will download into a randomly-named file in your temp directory.
-Note that this function relies on the availability of external tools such as `curl`, `wget`
-or `fetch` to download the file and is provided for convenience. For production use or
-situations in which more options are needed, please use a package that provides the desired
-functionality instead.
+Download a file from the given url, saving it to the location `path`, or if not
+specified, a temporary path. Returns the path of the downloaded file.
 
-Returns the filename of the downloaded file.
+!!! note
+    Since Julia 1.6, this function is deprecated and is just a thin wrapper
+    around `Downloads.download`. In new code, you should use that function
+    directly instead of calling this.
 """
-download(url, filename)
+function download(url::AbstractString, path::AbstractString)
+    invokelatest(Downloads().download, download_url(url), path)
+end
+function download(url::AbstractString)
+    invokelatest(Downloads().download, download_url(url))
+end
diff --git a/base/sysimg.jl b/base/sysimg.jl
index 85d0ac5a76b42..893af84577177 100644
--- a/base/sysimg.jl
+++ b/base/sysimg.jl
@@ -52,6 +52,10 @@ let
             :Test,
             :REPL,
             :Statistics,
+            :MozillaCACerts_jll,
+            :LibCURL_jll,
+            :LibCURL,
+            :Downloads,
         ]
 
     maxlen = reduce(max, textwidth.(string.(stdlibs)); init=0)
diff --git a/contrib/refresh_bb_tarballs.sh b/contrib/refresh_bb_tarballs.sh
index 867f66c74609d..e3c44b954d0b8 100755
--- a/contrib/refresh_bb_tarballs.sh
+++ b/contrib/refresh_bb_tarballs.sh
@@ -12,7 +12,7 @@
 TRIPLETS="i686-linux-gnu x86_64-linux-gnu aarch64-linux-gnu armv7l-linux-gnueabihf powerpc64le-linux-gnu i686-linux-musl x86_64-linux-musl aarch64-linux-musl armv7l-linux-musleabihf x86_64-apple-darwin14 x86_64-unknown-freebsd11.1 i686-w64-mingw32 x86_64-w64-mingw32"
 
 # These are the projects currently using BinaryBuilder; both GCC-expanded and non-GCC-expanded:
-BB_PROJECTS="mbedtls libssh2 mpfr curl libgit2 pcre libuv unwind osxunwind dsfmt objconv p7zip zlib suitesparse openlibm"
+BB_PROJECTS="mbedtls libssh2 nghttp2 mpfr curl libgit2 pcre libuv unwind osxunwind dsfmt objconv p7zip zlib suitesparse openlibm"
 BB_GCC_EXPANDED_PROJECTS="openblas"
 BB_CXX_EXPANDED_PROJECTS="gmp llvm"
 
diff --git a/deps/Makefile b/deps/Makefile
index a491e4f1a6eaa..174758d3afe92 100644
--- a/deps/Makefile
+++ b/deps/Makefile
@@ -111,11 +111,13 @@ ifeq ($(USE_SYSTEM_LIBSSH2), 0)
 DEP_LIBS += libssh2
 endif
 
-ifneq ($(OS), WINNT)
+ifeq ($(USE_SYSTEM_NGHTTP2), 0)
+DEP_LIBS += nghttp2
+endif
+
 ifeq ($(USE_SYSTEM_CURL), 0)
 DEP_LIBS += curl
 endif
-endif
 
 DEP_LIBS += libgit2
 endif # USE_SYSTEM_LIBGIT2
@@ -178,7 +180,7 @@ install: $(addprefix install-, $(DEP_LIBS))
 cleanall: $(addprefix clean-, $(DEP_LIBS))
 distcleanall: $(addprefix distclean-, $(DEP_LIBS))
 	rm -rf $(build_prefix)
-getall: get-llvm get-libuv get-pcre get-openlibm get-dsfmt get-openblas get-lapack get-suitesparse get-unwind get-osxunwind get-gmp get-mpfr get-patchelf get-utf8proc get-objconv get-mbedtls get-libssh2 get-curl get-libgit2 get-libwhich
+getall: get-llvm get-libuv get-pcre get-openlibm get-dsfmt get-openblas get-lapack get-suitesparse get-unwind get-osxunwind get-gmp get-mpfr get-patchelf get-utf8proc get-objconv get-mbedtls get-libssh2 get-nghttp2 get-curl get-libgit2 get-libwhich
 
 include $(SRCDIR)/llvm.mk
 include $(SRCDIR)/libuv.mk
@@ -195,6 +197,7 @@ include $(SRCDIR)/mpfr.mk
 include $(SRCDIR)/patchelf.mk
 include $(SRCDIR)/mbedtls.mk
 include $(SRCDIR)/libssh2.mk
+include $(SRCDIR)/nghttp2.mk
 include $(SRCDIR)/curl.mk
 include $(SRCDIR)/libgit2.mk
 include $(SRCDIR)/libwhich.mk
diff --git a/deps/Versions.make b/deps/Versions.make
index 0fe8ac56835f9..6ed63798bccd2 100644
--- a/deps/Versions.make
+++ b/deps/Versions.make
@@ -20,12 +20,14 @@ GMP_BB_REL = 1
 MPFR_VER = 4.1.0
 MPFR_BB_REL = 1
 PATCHELF_VER = 0.9
-MBEDTLS_VER = 2.16.0
-MBEDTLS_BB_REL = 1
+MBEDTLS_VER = 2.16.8
+MBEDTLS_BB_REL = 0
 LIBSSH2_VER = 1.9.0
 LIBSSH2_BB_REL = 1
-CURL_VER = 7.66.0
-CURL_BB_REL = 1
+CURL_VER = 7.71.1
+CURL_BB_REL = 0
+NGHTTP2_VER = 1.40.0
+NGHTTP2_BB_REL = 2
 LIBGIT2_VER = 1.0.1
 LIBGIT2_BB_REL = 0
 LIBUV_VER = 1.29.1
diff --git a/deps/checksums/Downloads-1a1d2e0a10209512f5b29e585bfd78e7a47f8f61.tar.gz/md5 b/deps/checksums/Downloads-1a1d2e0a10209512f5b29e585bfd78e7a47f8f61.tar.gz/md5
new file mode 100644
index 0000000000000..f908a2236edb1
--- /dev/null
+++ b/deps/checksums/Downloads-1a1d2e0a10209512f5b29e585bfd78e7a47f8f61.tar.gz/md5
@@ -0,0 +1 @@
+24a8b8fc2398d20c24a13ce73482a3d7
diff --git a/deps/checksums/Downloads-1a1d2e0a10209512f5b29e585bfd78e7a47f8f61.tar.gz/sha512 b/deps/checksums/Downloads-1a1d2e0a10209512f5b29e585bfd78e7a47f8f61.tar.gz/sha512
new file mode 100644
index 0000000000000..810280cef043b
--- /dev/null
+++ b/deps/checksums/Downloads-1a1d2e0a10209512f5b29e585bfd78e7a47f8f61.tar.gz/sha512
@@ -0,0 +1 @@
+4b652be535dce6a5cf36e546a31d3221f4c2534d1a3ac710f31f9ed2dfbeabd21b36c0186e4abe12cfee992ff557317aefe2bdeb9cb8b1c44da085b030719329
diff --git a/deps/checksums/LibCURL-70aa2cc3f8fa4488897136a0a700b5425bfffdfa.tar.gz/md5 b/deps/checksums/LibCURL-70aa2cc3f8fa4488897136a0a700b5425bfffdfa.tar.gz/md5
new file mode 100644
index 0000000000000..e869b0362ddc1
--- /dev/null
+++ b/deps/checksums/LibCURL-70aa2cc3f8fa4488897136a0a700b5425bfffdfa.tar.gz/md5
@@ -0,0 +1 @@
+829dd514bd1e0d2f9d8cc6c8d5085bba
diff --git a/deps/checksums/LibCURL-70aa2cc3f8fa4488897136a0a700b5425bfffdfa.tar.gz/sha512 b/deps/checksums/LibCURL-70aa2cc3f8fa4488897136a0a700b5425bfffdfa.tar.gz/sha512
new file mode 100644
index 0000000000000..83022f272ed48
--- /dev/null
+++ b/deps/checksums/LibCURL-70aa2cc3f8fa4488897136a0a700b5425bfffdfa.tar.gz/sha512
@@ -0,0 +1 @@
+080fa389e9a924484aeb50d4bccd314da7d264613d0951f3b8dd53f28f4080abe126cb3960dcb69434a9c6d915866de01977625960117bc5e9d77928efead1cb
diff --git a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-gnu.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-gnu.tar.gz/md5
deleted file mode 100644
index 32e2838288cfc..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-gnu.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-a9b50e20ccb840657b88ef5964f5b50d
diff --git a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-gnu.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-gnu.tar.gz/sha512
deleted file mode 100644
index 74d1ffe05a122..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-gnu.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-1bea6285dbbcb69f1be36ccd25898f6bc0635e07a1ae8c6731b6967ab5c897774e2455324d34decf84682937ac4affd439c0801acdebcfc5bf2bf3545da06072
diff --git a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-musl.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-musl.tar.gz/md5
deleted file mode 100644
index f36c3e70dde04..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-musl.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-eb113968d9770ca43cdcca8a40f25be8
diff --git a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-musl.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-musl.tar.gz/sha512
deleted file mode 100644
index c3a421a93e160..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.aarch64-linux-musl.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-6f96c6d982741aa6d84493bbc43495662943cf1158c2158b78f12085e3395e31fe958e742ea42de85fe69b63afb40ff255836cbdfa1aa39a57372d6cda0dbb1f
diff --git a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-gnueabihf.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-gnueabihf.tar.gz/md5
deleted file mode 100644
index d218f74d4a8ad..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-gnueabihf.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-f5a22f9885d44483940775cbce28fefb
diff --git a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-gnueabihf.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-gnueabihf.tar.gz/sha512
deleted file mode 100644
index ae084797c4dd8..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-gnueabihf.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-207bfab6aa91ffc89be3d8a8cf2d473c3b07dd2561a94a82e77887ba108ca2b7192d2531de23b1b9e3ae3d63e2f1c97add625eafdab9dcffe62f742f88d4ab66
diff --git a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-musleabihf.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-musleabihf.tar.gz/md5
deleted file mode 100644
index f7f85974f783d..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-musleabihf.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-8376478c61653188cdcee7b7f3bd7f56
diff --git a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-musleabihf.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-musleabihf.tar.gz/sha512
deleted file mode 100644
index 847992711ee82..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.armv7l-linux-musleabihf.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-e8c174714d825a87e9d062161b4752cf1daefd7672ba98268c416e38195df6ed70d97c8cf60ebec495a158873d9c9b1c20d878bc91cc677f03189a9de7d2f6d7
diff --git a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-gnu.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.i686-linux-gnu.tar.gz/md5
deleted file mode 100644
index 4a716fc3d7c41..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-gnu.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-0561371e7f5af0329174a5664cc502bc
diff --git a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-gnu.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.i686-linux-gnu.tar.gz/sha512
deleted file mode 100644
index 5207499b05151..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-gnu.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-065204141e83ceb31747932c8be28af738040f1fb814ec47506f78ca76ef83543319964ab9d2695cb7e7346eadff94a4882f7cb6d8f48054ac8e1481c2075308
diff --git a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-musl.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.i686-linux-musl.tar.gz/md5
deleted file mode 100644
index cfd7018769fbe..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-musl.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-bab1dabc470c8056b21568409eda36c6
diff --git a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-musl.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.i686-linux-musl.tar.gz/sha512
deleted file mode 100644
index bdf87a5d11156..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.i686-linux-musl.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-674d73397864df94bc519f9b538bb1c8d15f719c3f15ae037c347ce5c97b16a374cfd86ece572f2e9d56b90ffd00119ea9923c46792b038cb892965615f3f54c
diff --git a/deps/checksums/LibCURL.v7.66.0-1.i686-w64-mingw32.tar.gz/md5 b/deps/checksums/LibCURL.v7.66.0-1.i686-w64-mingw32.tar.gz/md5
deleted file mode 100644
index 4a292c1911dc7..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.i686-w64-mingw32.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-e43d122f5646d7e25bf50efd6e08009a
diff --git a/deps/checksums/LibCURL.v7.66.0-1.i686-w64-mingw32.tar.gz/sha512 b/deps/checksums/LibCURL.v7.66.0-1.i686-w64-mingw32.tar.gz/sha512
deleted file mode 100644
index 62234e4a8ac6a..0000000000000
--- a/deps/checksums/LibCURL.v7.66.0-1.i686-w64-mingw32.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
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@@ -0,0 +1 @@
+a90d499417c7f34a57eb60a53fd84b7a
diff --git a/deps/checksums/nghttp2.v1.40.0-2.x86_64-linux-musl.tar.gz/sha512 b/deps/checksums/nghttp2.v1.40.0-2.x86_64-linux-musl.tar.gz/sha512
new file mode 100644
index 0000000000000..f2321446567ec
--- /dev/null
+++ b/deps/checksums/nghttp2.v1.40.0-2.x86_64-linux-musl.tar.gz/sha512
@@ -0,0 +1 @@
+5534a43ebdd625f0cffde46e4865b1a1f99f0eb6ef5d8e6514528c04767d276cbf348ce9dc69ec31ba7cff0650b4ac9a7a8755e922053c22fb9be9cc384c07b4
diff --git a/deps/checksums/nghttp2.v1.40.0-2.x86_64-unknown-freebsd11.1.tar.gz/md5 b/deps/checksums/nghttp2.v1.40.0-2.x86_64-unknown-freebsd11.1.tar.gz/md5
new file mode 100644
index 0000000000000..fce02a1bed8e8
--- /dev/null
+++ b/deps/checksums/nghttp2.v1.40.0-2.x86_64-unknown-freebsd11.1.tar.gz/md5
@@ -0,0 +1 @@
+492bc0b6caf63aa0003240f5191e4944
diff --git a/deps/checksums/nghttp2.v1.40.0-2.x86_64-unknown-freebsd11.1.tar.gz/sha512 b/deps/checksums/nghttp2.v1.40.0-2.x86_64-unknown-freebsd11.1.tar.gz/sha512
new file mode 100644
index 0000000000000..8959753260517
--- /dev/null
+++ b/deps/checksums/nghttp2.v1.40.0-2.x86_64-unknown-freebsd11.1.tar.gz/sha512
@@ -0,0 +1 @@
+34226daac3ef30483e065d42d9797dc6c0536d90abb01f7a6dd74ca5bf211c5bf973fd44f8780625e8a73fcdc9b836d19e9154c0fe7ae10cf6b2679de2bff1e9
diff --git a/deps/checksums/nghttp2.v1.40.0-2.x86_64-w64-mingw32.tar.gz/md5 b/deps/checksums/nghttp2.v1.40.0-2.x86_64-w64-mingw32.tar.gz/md5
new file mode 100644
index 0000000000000..0b9f636d2107d
--- /dev/null
+++ b/deps/checksums/nghttp2.v1.40.0-2.x86_64-w64-mingw32.tar.gz/md5
@@ -0,0 +1 @@
+fb9dd5698a00475cc1fbf1220a438a96
diff --git a/deps/checksums/nghttp2.v1.40.0-2.x86_64-w64-mingw32.tar.gz/sha512 b/deps/checksums/nghttp2.v1.40.0-2.x86_64-w64-mingw32.tar.gz/sha512
new file mode 100644
index 0000000000000..e08be929d89ab
--- /dev/null
+++ b/deps/checksums/nghttp2.v1.40.0-2.x86_64-w64-mingw32.tar.gz/sha512
@@ -0,0 +1 @@
+9b2fe5b053216721c61e8e40ef35242d5f03bba390198c34687c3f1af702b3d199f61bb064db770ec3da93ee81e8356de26e1bf5d2196064a81c0fc3d4e316df
diff --git a/deps/nghttp2.mk b/deps/nghttp2.mk
new file mode 100644
index 0000000000000..a3c96789ce9c9
--- /dev/null
+++ b/deps/nghttp2.mk
@@ -0,0 +1,14 @@
+## nghttp2
+
+ifneq ($(USE_BINARYBUILDER_NGHTTP2), 1)
+$(error "Non-BinaryBuilder nghttp2 is not supported.")
+endif
+
+ifneq ($(USE_SYSTEM_NGHTTP2), 0)
+$(error "Non-BinaryBuilder nghttp2 is not supported.")
+endif
+
+NGHTTP2_BB_URL_BASE := https://github.com/JuliaBinaryWrappers/nghttp2_jll.jl/releases/download/nghttp2-v$(NGHTTP2_VER)+$(NGHTTP2_BB_REL)
+NGHTTP2_BB_NAME := nghttp2.v$(NGHTTP2_VER)
+
+$(eval $(call bb-install,nghttp2,NGHTTP2,false))
diff --git a/stdlib/.gitignore b/stdlib/.gitignore
index 2f7f49e24be1a..6679403487f0f 100644
--- a/stdlib/.gitignore
+++ b/stdlib/.gitignore
@@ -3,3 +3,7 @@
 /Pkg
 /Statistics-*
 /Statistics
+/LibCURL-*
+/LibCURL
+/Downloads-*
+/Downloads
diff --git a/stdlib/Downloads.version b/stdlib/Downloads.version
new file mode 100644
index 0000000000000..00ebee6d3aa32
--- /dev/null
+++ b/stdlib/Downloads.version
@@ -0,0 +1,2 @@
+DOWNLOADS_BRANCH = master
+DOWNLOADS_SHA1 = 1a1d2e0a10209512f5b29e585bfd78e7a47f8f61
diff --git a/stdlib/LibCURL.version b/stdlib/LibCURL.version
new file mode 100644
index 0000000000000..7d0ba888bac0b
--- /dev/null
+++ b/stdlib/LibCURL.version
@@ -0,0 +1,2 @@
+LIBCURL_BRANCH = master
+LIBCURL_SHA1 = 70aa2cc3f8fa4488897136a0a700b5425bfffdfa
diff --git a/stdlib/LibCURL_jll/Project.toml b/stdlib/LibCURL_jll/Project.toml
new file mode 100644
index 0000000000000..6fa50eedd4c7c
--- /dev/null
+++ b/stdlib/LibCURL_jll/Project.toml
@@ -0,0 +1,11 @@
+name = "LibCURL_jll"
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
+[deps]
+Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
+
+[extra]
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[targets]
+test = ["Test"]
diff --git a/stdlib/LibCURL_jll/src/LibCURL_jll.jl b/stdlib/LibCURL_jll/src/LibCURL_jll.jl
new file mode 100644
index 0000000000000..6692565fc03f1
--- /dev/null
+++ b/stdlib/LibCURL_jll/src/LibCURL_jll.jl
@@ -0,0 +1,32 @@
+# This file is a part of Julia. License is MIT: https://julialang.org/license
+
+## dummy stub for https://github.com/JuliaBinaryWrappers/LibCURL_jll.jl
+
+module LibCURL_jll
+
+using Libdl
+
+export libcurl
+
+# These get calculated in __init__()
+libcurl_handle = C_NULL
+libcurl_path = ""
+
+if Sys.iswindows()
+    const libnghttp2 = "libnghttp2-14.dll"
+    const libcurl = "libcurl-4.dll"
+elseif Sys.isapple()
+    const libnghttp2 = "libnghttp2.14.dylib"
+    const libcurl = "libcurl.4.dylib"
+else
+    const libnghttp2 = "libnghttp2.so"
+    const libcurl = "libcurl.so"
+end
+
+function __init__()
+    dlopen(libnghttp2)
+    global libcurl_handle = dlopen(libcurl)
+    global libcurl_path = dlpath(libcurl_handle)
+end
+
+end  # module LibCURL_jll
diff --git a/stdlib/LibCURL_jll/test/runtests.jl b/stdlib/LibCURL_jll/test/runtests.jl
new file mode 100644
index 0000000000000..0e762827d346e
--- /dev/null
+++ b/stdlib/LibCURL_jll/test/runtests.jl
@@ -0,0 +1,7 @@
+using Test
+using LibCURL_jll
+
+@testset "LibCURL_jll" begin
+    v = unsafe_string(ccall((:curl_version, libcurl), Cstring, ()))
+    @test startswith(v, "libcurl/")
+end
diff --git a/stdlib/Makefile b/stdlib/Makefile
index 4e748b42aac19..e4e1b524ac93a 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -17,12 +17,18 @@ $(build_datarootdir)/julia/stdlib/$(VERSDIR):
 STDLIBS = Artifacts Base64 CRC32c Dates DelimitedFiles Distributed FileWatching \
           Future InteractiveUtils Libdl LibGit2 LinearAlgebra Logging \
           Markdown Mmap Printf Profile Random REPL Serialization SHA \
-          SharedArrays Sockets SparseArrays SuiteSparse Test TOML Unicode UUIDs
-STDLIBS_EXT = Pkg Statistics
+          SharedArrays Sockets SparseArrays SuiteSparse Test TOML Unicode UUIDs \
+          MozillaCACerts_jll LibCURL_jll
+
+STDLIBS_EXT = Pkg Statistics LibCURL Downloads
 PKG_GIT_URL := git://github.com/JuliaLang/Pkg.jl.git
 PKG_TAR_URL = https://api.github.com/repos/JuliaLang/Pkg.jl/tarball/$1
 STATISTICS_GIT_URL := git://github.com/JuliaLang/Statistics.jl.git
 STATISTICS_TAR_URL = https://api.github.com/repos/JuliaLang/Statistics.jl/tarball/$1
+LIBCURL_GIT_URL := git://github.com/JuliaWeb/LibCURL.jl.git
+LIBCURL_TAR_URL = https://api.github.com/repos/JuliaWeb/LibCURL.jl/tarball/$1
+DOWNLOADS_GIT_URL := git://github.com/JuliaLang/Downloads.jl.git
+DOWNLOADS_TAR_URL = https://api.github.com/repos/JuliaLang/Downloads.jl/tarball/$1
 
 $(foreach module, $(STDLIBS_EXT), $(eval $(call stdlib-external,$(module),$(shell echo $(module) | tr a-z A-Z))))
 
diff --git a/stdlib/MozillaCACerts_jll/Project.toml b/stdlib/MozillaCACerts_jll/Project.toml
new file mode 100644
index 0000000000000..27596a641fb3e
--- /dev/null
+++ b/stdlib/MozillaCACerts_jll/Project.toml
@@ -0,0 +1,8 @@
+name = "MozillaCACerts_jll"
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[extra]
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[targets]
+test = ["Test"]
diff --git a/stdlib/MozillaCACerts_jll/src/MozillaCACerts_jll.jl b/stdlib/MozillaCACerts_jll/src/MozillaCACerts_jll.jl
new file mode 100644
index 0000000000000..d89ba83689e71
--- /dev/null
+++ b/stdlib/MozillaCACerts_jll/src/MozillaCACerts_jll.jl
@@ -0,0 +1,11 @@
+# This file is a part of Julia. License is MIT: https://julialang.org/license
+
+## dummy stub for https://github.com/JuliaBinaryWrappers/MozillaCACerts_jll.jl
+
+module MozillaCACerts_jll
+
+function __init__()
+	global cacert = normpath(Sys.BINDIR, Base.DATAROOTDIR, "julia", "cert.pem")
+end
+
+end # module
diff --git a/stdlib/MozillaCACerts_jll/test/runtests.jl b/stdlib/MozillaCACerts_jll/test/runtests.jl
new file mode 100644
index 0000000000000..a34cac7ba6775
--- /dev/null
+++ b/stdlib/MozillaCACerts_jll/test/runtests.jl
@@ -0,0 +1,6 @@
+using Test
+using MozillaCACerts_jll
+
+@testset "MozillaCACerts_jll" begin
+    @test isfile(MozillaCACerts_jll.cacert)
+end
diff --git a/test/choosetests.jl b/test/choosetests.jl
index 4f8cae9e4828a..9ca97a543123c 100644
--- a/test/choosetests.jl
+++ b/test/choosetests.jl
@@ -111,7 +111,7 @@ function choosetests(choices = [])
         filter!(x -> (x != "Profile"), tests)
     end
 
-    net_required_for = ["Sockets", "LibGit2"]
+    net_required_for = ["Sockets", "LibGit2", "LibCURL", "Downloads"]
     net_on = true
     try
         ipa = getipaddr()
diff --git a/test/download.jl b/test/download.jl
index 3f56b04dc4e43..11d33a91fa1fc 100644
--- a/test/download.jl
+++ b/test/download.jl
@@ -40,20 +40,11 @@ mktempdir() do temp_dir
 
     # Make sure that failed downloads do not leave files around
     missing_file = joinpath(temp_dir, "missing")
-    @test_throws ProcessFailedException download("https://httpbin.julialang.org/status/404", missing_file)
+    @test_throws ErrorException download("https://httpbin.julialang.org/status/404", missing_file)
     @test !isfile(missing_file)
 
-    # Make sure we properly handle metachar ' on windows with ^ escaping
-    if Sys.iswindows()
-        metachar_file = joinpath(temp_dir, "metachar")
-        Base.download_powershell("https://httpbin.julialang.org/get?test='^'", metachar_file)
-        metachar_string = read(metachar_file, String)
-        m = match(r"\"test\"\s*:\s*\"(.*)\"", metachar_string)
-        @test m.captures[1] == "'^'"
-    end
-
     # Use a TEST-NET (192.0.2.0/24) address which shouldn't be bound
     invalid_host_file = joinpath(temp_dir, "invalid_host")
-    @test_throws ProcessFailedException download("http://192.0.2.1", invalid_host_file)
+    @test_throws ErrorException download("http://192.0.2.1", invalid_host_file)
     @test !isfile(invalid_host_file)
 end
diff --git a/test/precompile.jl b/test/precompile.jl
index 9739704ee2c16..90c7e8e32699d 100644
--- a/test/precompile.jl
+++ b/test/precompile.jl
@@ -292,7 +292,7 @@ try
                  :Future, :Libdl, :LinearAlgebra, :Logging, :Mmap, :Printf,
                  :Profile, :Random, :Serialization, :SharedArrays, :SparseArrays, :SuiteSparse, :Test,
                  :Unicode, :REPL, :InteractiveUtils, :Pkg, :LibGit2, :SHA, :UUIDs, :Sockets,
-                 :Statistics, :TOML]),
+                 :Statistics, :TOML, :MozillaCACerts_jll, :LibCURL_jll, :LibCURL, :Downloads,]),
                 # Plus precompilation module generated at build time
                 let id = Base.PkgId("__PackagePrecompilationStatementModule")
                     Dict(id => Base.module_build_id(Base.root_module(id)))