Make reqwest build on wasm

5 files changed, 98 insertions, 51 deletions

diff --git a/Cargo.lock b/Cargo.lock
index f4aab68..977d701 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -82,6 +82,18 @@ dependencies = [
 ]
 
 [[package]]
+name = "blocking"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-channel 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "once_cell 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "waker-fn 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "bumpalo"
 version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -140,6 +152,7 @@ version = "0.5.2"
 dependencies = [
  "abnf_to_pest 0.5.0",
  "annotate-snippets 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blocking 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -247,42 +260,48 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "futures-channel"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "futures-core"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "futures-io"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "futures-sink"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "futures-task"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "once_cell 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "futures-util"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-io 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-utils 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -311,14 +330,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "http 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -329,7 +348,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.8"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -370,9 +389,9 @@ version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-channel 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "h2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "http 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "http-body 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -382,7 +401,7 @@ dependencies = [
  "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "tower-service 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "want 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -395,7 +414,7 @@ dependencies = [
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-tls 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -606,10 +625,10 @@ dependencies = [
 
 [[package]]
 name = "num_cpus"
-version = "1.12.0"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "hermit-abi 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -662,6 +681,11 @@ dependencies = [
 ]
 
 [[package]]
+name = "parking"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "percent-encoding"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -757,7 +781,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pin-utils"
-version = "0.1.0-alpha.4"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -915,8 +939,8 @@ dependencies = [
  "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "encoding_rs 0.8.22 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "http 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "http-body 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -932,7 +956,7 @@ dependencies = [
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_urlencoded 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-tls 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1044,7 +1068,6 @@ dependencies = [
  "dhall 0.5.2",
  "dhall_proc_macros 0.5.0",
  "doc-comment 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "reqwest 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "version-sync 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1161,7 +1184,7 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "0.2.13"
+version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1170,7 +1193,7 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1181,7 +1204,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "native-tls 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1190,11 +1213,11 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1310,6 +1333,11 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "waker-fn"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "walkdir"
 version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1469,6 +1497,7 @@ dependencies = [
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 "checksum block-buffer 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
 "checksum block-padding 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fa79dedbb091f449f1f39e53edf88d5dbe95f895dae6135a8d7b881fb5af73f5"
+"checksum blocking 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "f057b031309deb5469940f4acf48b652b0d69119069ae6c8392b8e15c5396798"
 "checksum bumpalo 3.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f359dc14ff8911330a51ef78022d376f25ed00248912803b58f00cb1c27f742"
 "checksum byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 "checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
@@ -1490,17 +1519,17 @@ dependencies = [
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 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
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-"checksum futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f25592f769825e89b92358db00d26f965761e094951ac44d3663ef25b7ac464a"
-"checksum futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a638959aa96152c7a4cddf50fcb1e3fede0583b27157c26e67d6f99904090dc6"
-"checksum futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "3466821b4bc114d95b087b850a724c6f83115e929bc88f1fa98a3304a944c8a6"
-"checksum futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7b0a34e53cf6cdcd0178aa573aed466b646eb3db769570841fda0c7ede375a27"
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+"checksum futures-channel 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "f366ad74c28cca6ba456d95e6422883cfb4b252a83bed929c83abfdbbf2967d5"
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+"checksum futures-util 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "8764574ff08b701a084482c3c7031349104b07ac897393010494beaa18ce32c6"
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 "checksum h2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9d5c295d1c0c68e4e42003d75f908f5e16a1edd1cbe0b0d02e4dc2006a384f47"
 "checksum half 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f36b5f248235f45773d4944f555f83ea61fe07b18b561ccf99d7483d7381e54d"
-"checksum hermit-abi 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "1010591b26bbfe835e9faeabeb11866061cc7dcebffd56ad7d0942d0e61aefd8"
+"checksum hermit-abi 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "91780f809e750b0a89f5544be56617ff6b1227ee485bcb06ebe10cdf89bd3b71"
 "checksum hex 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "644f9158b2f133fd50f5fb3242878846d9eb792e445c893805ff0e3824006e35"
 "checksum http 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b708cc7f06493459026f53b9a61a7a121a5d1ec6238dee58ea4941132b30156b"
 "checksum http-body 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "13d5ff830006f7646652e057693569bfe0d51760c0085a071769d142a205111b"
@@ -1531,13 +1560,14 @@ dependencies = [
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 "checksum nodrop 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 "checksum nom 5.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b471253da97532da4b61552249c521e01e736071f71c1a4f7ebbfbf0a06aad6"
-"checksum num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "46203554f085ff89c235cd12f7075f3233af9b11ed7c9e16dfe2560d03313ce6"
+"checksum num_cpus 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
 "checksum once_cell 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b1c601810575c99596d4afc46f78a678c80105117c379eb3650cf99b8a21ce5b"
 "checksum opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 "checksum openssl 0.10.28 (registry+https://github.com/rust-lang/crates.io-index)" = "973293749822d7dd6370d6da1e523b0d1db19f06c459134c658b2a4261378b52"
 "checksum openssl-probe 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
 "checksum openssl-sys 0.9.54 (registry+https://github.com/rust-lang/crates.io-index)" = "1024c0a59774200a555087a6da3f253a9095a5f344e353b212ac4c8b8e450986"
 "checksum output_vt100 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "53cdc5b785b7a58c5aad8216b3dfa114df64b0b06ae6e1501cef91df2fbdf8f9"
+"checksum parking 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7fad362df89617628a7508b3e9d588ade1b0ac31aa25de168193ad999c2dd4"
 "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
 "checksum percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 "checksum pest 2.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "10f4872ae94d7b90ae48754df22fd42ad52ce740b8f370b03da4835417403e53"
@@ -1549,7 +1579,7 @@ dependencies = [
 "checksum pin-project 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7804a463a8d9572f13453c516a5faea534a2403d7ced2f0c7e100eeff072772c"
 "checksum pin-project-internal 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "385322a45f2ecf3410c68d2a549a4a2685e8051d0f278e39743ff4e451cb9b3f"
 "checksum pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "237844750cfbb86f67afe27eee600dfbbcb6188d734139b534cbfbf4f96792ae"
-"checksum pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5894c618ce612a3fa23881b152b608bafb8c56cfc22f434a3ba3120b40f7b587"
+"checksum pin-utils 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 "checksum pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)" = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
 "checksum ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
 "checksum pretty 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f60c0d9f6fc88ecdd245d90c1920ff76a430ab34303fc778d33b1d0a4c3bf6d3"
@@ -1593,7 +1623,7 @@ dependencies = [
 "checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 "checksum thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
 "checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
-"checksum tokio 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)" = "0fa5e81d6bc4e67fe889d5783bd2a128ab2e0cfa487e0be16b6a8d177b101616"
+"checksum tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)" = "d099fa27b9702bed751524694adbe393e18b36b204da91eb1cbbbbb4a5ee2d58"
 "checksum tokio-tls 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7bde02a3a5291395f59b06ec6945a3077602fac2b07eeeaf0dee2122f3619828"
 "checksum tokio-util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "571da51182ec208780505a32528fc5512a8fe1443ab960b3f2f3ef093cd16930"
 "checksum toml 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ffc92d160b1eef40665be3a05630d003936a3bc7da7421277846c2613e92c71a"
@@ -1612,6 +1642,7 @@ dependencies = [
 "checksum vcpkg 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3fc439f2794e98976c88a2a2dafce96b930fe8010b0a256b3c2199a773933168"
 "checksum version-sync 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "844f3d3a2467f15cb999f5af7775f6e108ac546d4f42365832ed4c755404f806"
 "checksum version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
+"checksum waker-fn 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9571542c2ce85ce642e6b58b3364da2fb53526360dfb7c211add4f5c23105ff7"
 "checksum walkdir 2.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "777182bc735b6424e1a57516d35ed72cb8019d85c8c9bf536dccb3445c1a2f7d"
 "checksum want 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
 "checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
diff --git a/dhall/Cargo.toml b/dhall/Cargo.toml
index 376506f..adf92d6 100644
--- a/dhall/Cargo.toml
+++ b/dhall/Cargo.toml
@@ -19,13 +19,20 @@ once_cell = "1.3.1"
 percent-encoding = "2.1.0"
 pest = "2.1"
 pest_consume = "1.0"
-reqwest = { version = "0.10", features = ["blocking"] }
 serde = "1.0"
 serde_cbor = "0.9.0"
 sha2 = "0.8.1"
 smallvec = "1.0.0"
 url = "2.1"
 
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+reqwest = { version = "0.10", features = ["blocking"] }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+# Disable native tls because hyper doesn't build on wasm
+reqwest = { version = "0.10", default-features = false }
+blocking = "0.4.3"
+
 [dev-dependencies]
 pretty_assertions = "0.6.1"
 version-sync = "0.8"
diff --git a/dhall/src/semantics/parse.rs b/dhall/src/semantics/parse.rs
index 2326471..82396e0 100644
--- a/dhall/src/semantics/parse.rs
+++ b/dhall/src/semantics/parse.rs
@@ -4,7 +4,7 @@ use std::path::Path;
 use url::Url;
 
 use crate::error::Error;
-use crate::semantics::resolve::ImportLocation;
+use crate::semantics::resolve::{download_http_text, ImportLocation};
 use crate::syntax::binary;
 use crate::syntax::parse_expr;
 use crate::Parsed;
@@ -17,7 +17,7 @@ pub fn parse_file(f: &Path) -> Result<Parsed, Error> {
 }
 
 pub fn parse_remote(url: Url) -> Result<Parsed, Error> {
-    let body = reqwest::blocking::get(url.clone()).unwrap().text().unwrap();
+    let body = download_http_text(url.clone())?;
     let expr = parse_expr(&body)?;
     let root = ImportLocation::Remote(url);
     Ok(Parsed(expr, root))
diff --git a/dhall/src/semantics/resolve/resolve.rs b/dhall/src/semantics/resolve/resolve.rs
index 3b72b9e..fb770db 100644
--- a/dhall/src/semantics/resolve/resolve.rs
+++ b/dhall/src/semantics/resolve/resolve.rs
@@ -159,9 +159,7 @@ impl ImportLocation {
     fn fetch_text(self) -> Result<String, Error> {
         Ok(match self {
             ImportLocation::Local(path) => std::fs::read_to_string(&path)?,
-            ImportLocation::Remote(url) => {
-                reqwest::blocking::get(url).unwrap().text().unwrap()
-            }
+            ImportLocation::Remote(url) => download_http_text(url)?,
             ImportLocation::Env(var_name) => match env::var(var_name) {
                 Ok(val) => val,
                 Err(_) => return Err(ImportError::MissingEnvVar.into()),
@@ -197,6 +195,18 @@ fn mkexpr(kind: UnspannedExpr) -> Expr {
     Expr::new(kind, Span::Artificial)
 }
 
+// TODO: error handling
+#[cfg(not(target_arch = "wasm32"))]
+pub(crate) fn download_http_text(url: Url) -> Result<String, Error> {
+    Ok(reqwest::blocking::get(url).unwrap().text().unwrap())
+}
+#[cfg(target_arch = "wasm32")]
+pub(crate) fn download_http_text(url: Url) -> Result<String, Error> {
+    blocking::block_on(async {
+        Ok(reqwest::get(url).await.unwrap().text().await.unwrap())
+    })
+}
+
 fn make_aslocation_uniontype() -> Expr {
     let text_type = mkexpr(ExprKind::Builtin(Builtin::Text));
     let mut union = BTreeMap::default();
diff --git a/serde_dhall/Cargo.toml b/serde_dhall/Cargo.toml
index 6842209..1b66aa1 100644
--- a/serde_dhall/Cargo.toml
+++ b/serde_dhall/Cargo.toml
@@ -15,7 +15,6 @@ serde = { version = "1.0", features = ["derive"] }
 dhall = { version = "= 0.5.2", path = "../dhall" }
 dhall_proc_macros = { version = "= 0.5.0", path = "../dhall_proc_macros" }
 doc-comment = "0.3"
-reqwest = { version = "0.10", features = ["blocking"] }
 url = "2.1"
 
 [dev-dependencies]